feat: PostgreSQL 17 вместо SQLite

pg + connect-pg-simple, async routes, docker-compose, скрипт setup-postgres. Co-authored-by: Cursor <cursoragent@cursor.com>
2026-05-17 09:32:41 +03:00
parent cb3b8bc49f
commit 7060b0566a
18 changed files with 808 additions and 768 deletions
@@ -3,3 +3,11 @@ HOST=127.0.0.1
 NODE_ENV=production
 TRUST_PROXY=1
 SESSION_SECRET=change-me-to-a-long-random-string
+
+# PostgreSQL 17 (одна строка или отдельные переменные)
+DATABASE_URL=postgresql://shop:shop@127.0.0.1:5432/shop
+# PGHOST=127.0.0.1
+# PGPORT=5432
+# PGUSER=shop
+# PGPASSWORD=shop
+# PGDATABASE=shop
@@ -1,6 +1,3 @@
 node_modules/
-data/
 .env
-*.db
-*.db-journal
-sessions.db
+data/
@@ -1,6 +1,6 @@
 # Shop

-Интернет-магазин на **Node.js** с локальной базой **SQLite**.
+Интернет-магазин на **Node.js** и **PostgreSQL 17**.

 ## Возможности

@@ -12,119 +12,125 @@
 ## Требования

 - Node.js 18+
+- PostgreSQL 17
 - npm
- На Linux для сборки `better-sqlite3`: `build-essential`, `python3`
+
+---
+
+## PostgreSQL 17
+
+### Docker (разработка / тест)
+
+```bash
+docker compose up -d
+# БД: postgresql://shop:shop@127.0.0.1:5432/shop
+```
+
+### Ubuntu (сервер)
+
+```bash
+apt update
+apt install -y postgresql-17 postgresql-client-17
+
+# Пользователь и база shop
+cd /opt/shop
+sudo bash scripts/setup-postgres-ubuntu.sh
+```
+
+Схема таблиц: `postgres/init/01_schema.sql` (применяется при старте приложения и при первом запуске Docker).
+
+Сессии хранятся в PostgreSQL (таблица `session`, создаётся автоматически).

 ---

 ## Быстрый развёртывание на Ubuntu

-Скопируйте блок целиком на чистый сервер Ubuntu 22.04 / 24.04 (от root или через `sudo`):
-
 ```bash
-# 1. Зависимости системы
+# 1. Система + Node.js 20
 apt update
-apt install -y git curl build-essential python3
-
-# 2. Node.js 20 LTS
+apt install -y git curl
 curl -fsSL https://deb.nodesource.com/setup_20.x | bash -
 apt install -y nodejs

-# 3. Клонирование (подставьте URL вашего репозитория)
+# 2. PostgreSQL 17
+apt install -y postgresql-17 postgresql-client-17
+
+# 3. Код
 cd /opt
 git clone <URL_РЕПОЗИТОРИЯ> shop
 cd shop

-# 4. Настройка окружения
+# 4. БД
+bash scripts/setup-postgres-ubuntu.sh
+
+# 5. Окружение
 cp .env.example .env
-# Сгенерируйте секрет сессии:
 sed -i "s/change-me-to-a-long-random-string/$(openssl rand -hex 32)/" .env
+# Проверьте DATABASE_URL в .env

-# 5. Установка приложения
+# 6. Приложение
 npm install --omit=dev
-
-# 6. Caddy (HTTPS + прокси) — см. раздел ниже; для проверки без домена:
 npm start
 ```

-Без Caddy сайт на **http://IP_СЕРВЕРА:3000**. С Caddy — **https://ваш-домен** (любой, указанный в `Caddyfile`).
+Проверка:

-В `.env` для production задайте (уже есть в `.env.example`):
+```bash
+curl -s http://127.0.0.1:3000/health
+# {"ok":true,"service":"shop","database":"postgresql"}
+```
+
+### Переменные `.env`

 ```env
 PORT=3000
 HOST=127.0.0.1
 NODE_ENV=production
 TRUST_PROXY=1
-SESSION_SECRET=ваш-длинный-секрет
+SESSION_SECRET=длинный-секрет
+DATABASE_URL=postgresql://shop:shop@127.0.0.1:5432/shop
 ```

-`HOST=127.0.0.1` — Node слушает только localhost; снаружи доступ через Caddy.
-
-При первом запуске создаются `data/shop.db`, `data/sessions.db` и демо-товары.
+| Переменная | Описание |
+|------------|----------|
+| `DATABASE_URL` | Строка подключения PostgreSQL |
+| `PGHOST`, `PGPORT`, `PGUSER`, `PGPASSWORD`, `PGDATABASE` | Альтернатива `DATABASE_URL` |
+| `HOST` | `127.0.0.1` в production (доступ через Caddy) |

 ---

 ## Запуск как служба (systemd)

-Чтобы магазин работал после перезагрузки сервера:
-
 ```bash
 cp /opt/shop/deploy/shop.service /etc/systemd/system/shop.service

-# Код обновляйте от root; НЕ делайте chown -R на весь /opt/shop (ломает git pull)
 cd /opt/shop
 git config --global --add safe.directory /opt/shop
-git pull
 npm install --omit=dev

-# Запись только в data/ — для пользователя службы www-data
-mkdir -p /opt/shop/data
-chown -R www-data:www-data /opt/shop/data
-chmod +x /opt/shop/scripts/diagnose-502.sh 2>/dev/null || true
-
+# Код — root, служба — www-data (только чтение кода достаточно)
 systemctl daemon-reload
 systemctl enable shop
 systemctl start shop
-systemctl status shop
-
-# Backend должен ответить:
-curl -s http://127.0.0.1:3000/health
-# {"ok":true,"service":"shop"}
+journalctl -u shop -f
 ```

-Логи: `journalctl -u shop -f`
+`EnvironmentFile=/opt/shop/.env` должен содержать `DATABASE_URL`.

 ---

 ## Проверка после установки

-Перед настройкой Caddy убедитесь, что Node отвечает локально:
-
 ```bash
-cd /opt/shop
 systemctl restart shop
 sleep 1
-
 curl -s http://127.0.0.1:3000/health
-# {"ok":true,"service":"shop"}
-
 ss -tlnp | grep 3000
-# LISTEN ... 127.0.0.1:3000 ... node
-
 journalctl -u shop -n 5 --no-pager
-# должна быть строка: Магазин: http://127.0.0.1:3000
+# Магазин: http://127.0.0.1:3000 (PostgreSQL)
 ```

-Если в логе только «База уже содержит товары…» и служба сразу останавливается — обновите код: `git pull` (нужна актуальная версия `seed.js`).
-
-После успешной проверки настройте Caddy и выполните:
-
-```bash
-systemctl reload caddy
-```
-
-Обновление на сервере одной командой:
+Обновление:

 ```bash
 bash /opt/shop/scripts/server-update.sh
@@ -132,17 +138,9 @@ bash /opt/shop/scripts/server-update.sh

 ---

-## Caddy — SSL и reverse proxy (рекомендуется)
+## Caddy — SSL и reverse proxy

-[Caddy](https://caddyserver.com/) автоматически выпускает и продлевает сертификаты Let's Encrypt.
-
-**Перед установкой:**
-
-1. Домен указывает на IP сервера (A-запись).
-2. Открыты порты **80** и **443** в файрволе.
-3. Служба `shop` запущена и слушает `127.0.0.1:3000`.
-
-### Установка Caddy на Ubuntu
+**Перед Caddy:** `curl http://127.0.0.1:3000/health` → OK.

 ```bash
 apt install -y debian-keyring debian-archive-keyring apt-transport-https
@@ -150,21 +148,17 @@ curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/gpg.key' \
  | gpg --dearmor -o /usr/share/keyrings/caddy-stable-archive-keyring.gpg
 curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/debian.deb.txt' \
  | tee /etc/apt/sources.list.d/caddy-stable.list
-apt update
-apt install -y caddy
-```
+apt update && apt install -y caddy

-### Конфигурация
-
-В репозитории лежит пример: `caddy/Caddyfile.example`.
-
-```bash
-# Замените shop.example.com и email на свои
 cp /opt/shop/caddy/Caddyfile.example /etc/caddy/Caddyfile
-nano /etc/caddy/Caddyfile
+nano /etc/caddy/Caddyfile   # ваш домен и email
+
+caddy validate --config /etc/caddy/Caddyfile
+systemctl enable caddy
+systemctl reload caddy
 ```

-Пример `/etc/caddy/Caddyfile`:
+Пример `Caddyfile`:

 ```caddyfile
 {
@@ -177,178 +171,59 @@ shop.example.com {
 }
 ```

-Проверка и перезапуск:
+Порты **80/443** открыть; **5432** и **3000** наружу не публиковать.

-```bash
-caddy validate --config /etc/caddy/Caddyfile
-systemctl enable caddy
-systemctl reload caddy
-systemctl status caddy
-```
-
-Сайт откроется по домену из блока `Caddyfile` (в примере — `shop.example.com`).
-
-Логи Caddy: `journalctl -u caddy -f`
-
-### Файрвол (ufw)
-
-```bash
-ufw allow 22/tcp
-ufw allow 80/tcp
-ufw allow 443/tcp
-ufw enable
-```
-
-Порт **3000** наружу не открывайте — к приложению ходят только через Caddy.
-
-### Порядок запуска после перезагрузки
-
-1. `shop` (Node.js на `127.0.0.1:3000`)
-2. `caddy` (прокси + HTTPS)
-
-### HTTP 502 при рабочем SSL
-
-**SSL есть, 502 — значит Caddy жив, а Node на `127.0.0.1:3000` не отвечает.**
-
-На сервере выполните:
+### HTTP 502

 ```bash
 bash /opt/shop/scripts/diagnose-502.sh
 journalctl -u shop -n 50 --no-pager
-curl -v http://127.0.0.1:3000/health
 ```

-**Частые причины и исправление:**
-
-| Причина | Что сделать |
-|--------|-------------|
-| Служба `shop` не запущена или падает | `systemctl restart shop`, смотрите логи `journalctl -u shop -f` |
-| Нет `npm install` / сломан `better-sqlite3` | `cd /opt/shop && npm install --omit=dev` (нужны `build-essential`, `python3`) |
-| Нет прав на `data/` у `www-data` | `mkdir -p /opt/shop/data && chown -R www-data:www-data /opt/shop/data` |
-| `dubious ownership` / нет `git pull` | `chown -R root:root /opt/shop` + `safe.directory` (см. выше) |
-| В `.env` нет `HOST`/`PORT` | `HOST=127.0.0.1`, `PORT=3000`, затем `systemctl restart shop` |
-| Неверный путь к `node` в systemd | `which node` → подставьте в `ExecStart` в `/etc/systemd/system/shop.service` |
-| Caddy стартовал раньше shop | `cp deploy/caddy-after-shop.conf /etc/systemd/system/caddy.service.d/shop.conf` и `daemon-reload` |
-| В логе seed и сразу `Deactivated` | `git pull` — старый `seed.js` вызывал `process.exit` до старта сервера |
-
-**Быстрое восстановление:**
-
-```bash
-cd /opt/shop
-git config --global --add safe.directory /opt/shop
-git pull
-npm install --omit=dev
-mkdir -p data
-chown -R www-data:www-data /opt/shop/data
-systemctl restart shop
-curl -s http://127.0.0.1:3000/health   # должен быть {"ok":true,...}
-systemctl reload caddy
-```
-
-**Ошибка `dubious ownership` при `git pull`:**
-
-Вы сделали `chown -R www-data` на весь каталог. Верните владельца репозиторию root и оставьте `data/` за www-data:
-
-```bash
-chown -R root:root /opt/shop
-chown -R www-data:www-data /opt/shop/data
-git config --global --add safe.directory /opt/shop
-git pull
-```
-
-Пока `curl http://127.0.0.1:3000/health` не возвращает OK — HTTPS через Caddy будет отдавать 502.
-
-### Другие проблемы
-
-| Симптом | Решение |
+| Причина | Решение |
 |--------|---------|
-| Нет сертификата | DNS, порты 80/443, верный домен в `Caddyfile` |
-| Редирект-цикл / нет cookies | В `.env`: `TRUST_PROXY=1`, `NODE_ENV=production` |
-
---
-
-## Обновление с Git
-
-```bash
-cd /opt/shop
-bash scripts/server-update.sh
-```
-
-Или вручную:
-
-```bash
-cd /opt/shop
-git config --global --add safe.directory /opt/shop
-git pull
-npm install --omit=dev
-mkdir -p data && chown -R www-data:www-data data
-systemctl restart shop
-curl -s http://127.0.0.1:3000/health
-systemctl reload caddy   # если меняли Caddyfile
-```
+| PostgreSQL не запущен | `systemctl start postgresql` |
+| Неверный `DATABASE_URL` | проверить `.env`, `psql` |
+| Node не слушает 3000 | `journalctl -u shop -f` |
+| Caddy без backend | сначала `curl /health`, потом `reload caddy` |

 ---

 ## Локальная разработка

 ```bash
-npm install
+docker compose up -d
 cp .env.example .env
+npm install
 npm run dev
 ```

-Сайт: [http://localhost:3000](http://localhost:3000)
-
-## Переменные окружения
-
-| Переменная       | Описание                  | По умолчанию   |
-|------------------|---------------------------|----------------|
-| `PORT`           | Порт HTTP-сервера         | `3000`         |
-| `HOST`           | Адрес привязки            | `0.0.0.0` (dev), `127.0.0.1` (prod) |
-| `NODE_ENV`       | Режим (`production` — secure cookies) | — |
-| `TRUST_PROXY`    | Доверять заголовкам Caddy (`1`) | — |
-| `SESSION_SECRET` | Секрет для сессий         | dev-значение    |
-
 ## Скрипты npm

 | Команда | Описание |
-|----------------|----------------------------------|
-| `npm start`    | Запуск сервера (production)      |
-| `npm run dev`  | Запуск с автоперезагрузкой       |
-| `npm run seed` | Заполнение каталога, если пуст   |
+|---------|----------|
+| `npm start` | Запуск сервера |
+| `npm run dev` | С автоперезагрузкой |
+| `npm run seed` | Демо-товары (если каталог пуст) |

-## База данных
-
-Локально в каталоге `data/`:
-
- `shop.db` — товары, пользователи, заказы
- `sessions.db` — сессии
-
-Каталог `data/` в git не попадает (см. `.gitignore`). Делайте резервные копии:
-
-```bash
-cp -a data/shop.db data/shop.db.bak
-```
-
-## Структура проекта
+## Структура

 ```
-caddy/
-  Caddyfile.example   — пример reverse proxy + SSL
-deploy/
-  shop.service        — unit для systemd
+postgres/init/01_schema.sql
+docker-compose.yml          — PostgreSQL 17 локально
+caddy/Caddyfile.example
+deploy/shop.service
 scripts/
-  diagnose-502.sh     — проверка при 502
-  server-update.sh    — git pull + restart + health
+  setup-postgres-ubuntu.sh
+  diagnose-502.sh
+  server-update.sh
 src/
-  server.js           — точка входа
-  db.js               — схема SQLite
-  seed.js             — демо-данные
-  routes/             — маршруты
-  views/              — шаблоны EJS
-  public/css/         — стили
 ```

+## Миграция с SQLite
+
+Старая версия хранила данные в `data/*.db`. После перехода на PostgreSQL выполните `git pull`, настройте `DATABASE_URL`, `npm install` — при первом запуске создастся схема и демо-каталог (если таблица `products` пуста). Пользователей и заказы из SQLite нужно переносить вручную или заново зарегистрироваться.
+
 ## Репозиторий

 ```bash
@@ -0,0 +1,22 @@
+services:
+  postgres:
+    image: postgres:17
+    container_name: shop-postgres
+    restart: unless-stopped
+    environment:
+      POSTGRES_USER: shop
+      POSTGRES_PASSWORD: shop
+      POSTGRES_DB: shop
+    ports:
+      - '5432:5432'
+    volumes:
+      - shop_pg_data:/var/lib/postgresql/data
+      - ./postgres/init:/docker-entrypoint-initdb.d:ro
+    healthcheck:
+      test: ['CMD-SHELL', 'pg_isready -U shop -d shop']
+      interval: 5s
+      timeout: 5s
+      retries: 5
+
+volumes:
+  shop_pg_data:
@@ -1,7 +1,7 @@
 {
  "name": "shop",
-  "version": "1.0.0",
-  "description": "Интернет-магазин на Node.js с локальной SQLite",
+  "version": "2.0.0",
+  "description": "Интернет-магазин на Node.js с PostgreSQL 17",
  "main": "src/server.js",
  "scripts": {
    "start": "node src/server.js",
@@ -13,10 +13,10 @@
  },
  "dependencies": {
    "bcryptjs": "^2.4.3",
-    "better-sqlite3": "^11.7.0",
-    "connect-sqlite3": "^0.9.15",
+    "connect-pg-simple": "^10.0.0",
    "ejs": "^3.1.10",
    "express": "^4.21.2",
-    "express-session": "^1.18.1"
+    "express-session": "^1.18.1",
+    "pg": "^8.13.1"
  }
 }
@@ -0,0 +1,52 @@
+-- PostgreSQL 17 — схема магазина
+
+CREATE TABLE IF NOT EXISTS users (
+  id SERIAL PRIMARY KEY,
+  email TEXT NOT NULL UNIQUE,
+  password_hash TEXT NOT NULL,
+  name TEXT NOT NULL,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE TABLE IF NOT EXISTS categories (
+  id SERIAL PRIMARY KEY,
+  slug TEXT NOT NULL UNIQUE,
+  name TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS products (
+  id SERIAL PRIMARY KEY,
+  category_id INTEGER REFERENCES categories(id) ON DELETE SET NULL,
+  slug TEXT NOT NULL UNIQUE,
+  name TEXT NOT NULL,
+  description TEXT NOT NULL DEFAULT '',
+  price_cents INTEGER NOT NULL CHECK (price_cents >= 0),
+  stock INTEGER NOT NULL DEFAULT 0 CHECK (stock >= 0),
+  image_url TEXT,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE TABLE IF NOT EXISTS orders (
+  id SERIAL PRIMARY KEY,
+  user_id INTEGER NOT NULL REFERENCES users(id),
+  status TEXT NOT NULL DEFAULT 'pending'
+    CHECK (status IN ('pending', 'paid', 'shipped', 'cancelled')),
+  total_cents INTEGER NOT NULL CHECK (total_cents >= 0),
+  customer_name TEXT NOT NULL,
+  customer_email TEXT NOT NULL,
+  customer_phone TEXT NOT NULL DEFAULT '',
+  address TEXT NOT NULL,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE TABLE IF NOT EXISTS order_items (
+  id SERIAL PRIMARY KEY,
+  order_id INTEGER NOT NULL REFERENCES orders(id) ON DELETE CASCADE,
+  product_id INTEGER NOT NULL REFERENCES products(id),
+  quantity INTEGER NOT NULL CHECK (quantity > 0),
+  price_cents INTEGER NOT NULL CHECK (price_cents >= 0)
+);
+
+CREATE INDEX IF NOT EXISTS idx_products_category ON products(category_id);
+CREATE INDEX IF NOT EXISTS idx_orders_user ON orders(user_id);
+CREATE INDEX IF NOT EXISTS idx_products_name ON products(name);
@@ -1,53 +1,52 @@
 #!/bin/bash
-# Диагностика HTTP 502 (Caddy не достучался до Node)
+# Диагностика HTTP 502 (Caddy не достучался до Node / БД)
 set -e

 echo "=== Shop / Caddy 502 diagnostic ==="
 echo

-echo "1. Служба shop"
-systemctl is-active shop 2>/dev/null || echo "  shop: не установлена или не active"
-systemctl status shop --no-pager -l 2>/dev/null | head -20 || true
+echo "1. PostgreSQL"
+if command -v pg_isready >/dev/null; then
+  pg_isready -h 127.0.0.1 -p 5432 && echo "  pg_isready: OK" || echo "  pg_isready: FAIL"
+else
+  echo "  pg_isready не найден"
+fi
 echo

-echo "2. Служба caddy"
+echo "2. Служба shop"
+systemctl is-active shop 2>/dev/null || echo "  shop: не active"
+systemctl status shop --no-pager -l 2>/dev/null | head -15 || true
+echo
+
+echo "3. Служба caddy"
 systemctl is-active caddy 2>/dev/null || true
 echo

-echo "3. Порт 3000"
+echo "4. Порт 3000"
 if command -v ss >/dev/null; then
-  ss -tlnp | grep ':3000' || echo "  Ничего не слушает порт 3000 — запустите shop"
+  ss -tlnp | grep ':3000' || echo "  Ничего не слушает порт 3000"
 else
-  netstat -tlnp 2>/dev/null | grep ':3000' || echo "  Порт 3000 не слушается"
+  netstat -tlnp 2>/dev/null | grep ':3000' || true
 fi
 echo

-echo "4. curl backend"
+echo "5. curl backend"
 if curl -sf --max-time 3 http://127.0.0.1:3000/health; then
  echo
-  echo "  OK — Node отвечает, проблема скорее в Caddyfile"
+  echo "  OK"
 else
-  echo "  FAIL — Node не отвечает на 127.0.0.1:3000"
-  echo "  Проверьте: journalctl -u shop -n 50 --no-pager"
+  echo "  FAIL — проверьте DATABASE_URL и journalctl -u shop"
 fi
 echo

-echo "5. .env (HOST, PORT)"
+echo "6. .env"
 if [ -f /opt/shop/.env ]; then
-  grep -E '^(HOST|PORT|NODE_ENV)=' /opt/shop/.env || true
+  grep -E '^(DATABASE_URL|HOST|PORT)=' /opt/shop/.env 2>/dev/null | sed 's/=.*/=***/' || true
+  grep -E '^DATABASE_URL=' /opt/shop/.env || echo "  DATABASE_URL не задан"
 else
  echo "  /opt/shop/.env не найден"
 fi
 echo

-echo "6. Права data/"
-if [ -d /opt/shop/data ]; then
-  ls -la /opt/shop/data
-else
-  echo "  Каталог data/ отсутствует — создайте: mkdir -p /opt/shop/data && chown www-data:www-data /opt/shop/data"
-fi
-echo
-
 echo "7. Node"
-which node || which nodejs || echo "  node не найден в PATH"
-node -v 2>/dev/null || nodejs -v 2>/dev/null || true
+which node && node -v
@@ -9,9 +9,6 @@ git pull

 npm install --omit=dev

-mkdir -p data
-chown -R www-data:www-data data
-
 if systemctl is-active --quiet shop 2>/dev/null; then
  systemctl restart shop
  sleep 1
@@ -0,0 +1,32 @@
+#!/bin/bash
+# PostgreSQL 17 на Ubuntu — пользователь и БД для магазина
+# Запуск: sudo bash scripts/setup-postgres-ubuntu.sh
+set -euo pipefail
+
+DB_USER="${DB_USER:-shop}"
+DB_PASS="${DB_PASS:-shop}"
+DB_NAME="${DB_NAME:-shop}"
+
+if ! command -v psql >/dev/null; then
+  echo "Установите PostgreSQL 17:"
+  echo "  apt install -y postgresql-17 postgresql-client-17"
+  exit 1
+fi
+
+sudo -u postgres psql -v ON_ERROR_STOP=1 <<EOF
+DO \$\$
+BEGIN
+  IF NOT EXISTS (SELECT FROM pg_roles WHERE rolname = '${DB_USER}') THEN
+    CREATE ROLE ${DB_USER} LOGIN PASSWORD '${DB_PASS}';
+  END IF;
+END
+\$\$;
+
+SELECT 'CREATE DATABASE ${DB_NAME} OWNER ${DB_USER}'
+WHERE NOT EXISTS (SELECT FROM pg_database WHERE datname = '${DB_NAME}')\gexec
+
+GRANT ALL PRIVILEGES ON DATABASE ${DB_NAME} TO ${DB_USER};
+EOF
+
+echo ""
+echo "DATABASE_URL=postgresql://${DB_USER}:${DB_PASS}@127.0.0.1:5432/${DB_NAME}"
@@ -1,3 +1,5 @@
+const { query } = require('./db');
+
 function getCart(req) {
  if (!req.session.cart) {
    req.session.cart = {};
@@ -9,14 +11,15 @@ function cartCount(cart) {
  return Object.values(cart).reduce((sum, qty) => sum + qty, 0);
 }

-function cartItems(db, cart) {
+async function cartItems(cart) {
  const ids = Object.keys(cart).map(Number).filter(Boolean);
  if (ids.length === 0) return [];

-  const placeholders = ids.map(() => '?').join(',');
-  const products = db
-    .prepare(`SELECT * FROM products WHERE id IN (${placeholders})`)
-    .all(...ids);
+  const placeholders = ids.map((_, i) => `$${i + 1}`).join(',');
+  const { rows: products } = await query(
+    `SELECT * FROM products WHERE id IN (${placeholders})`,
+    ids
+  );

  return products
    .map((p) => ({
@@ -1,69 +1,39 @@
 const fs = require('fs');
 const path = require('path');
-const Database = require('better-sqlite3');
+const { Pool } = require('pg');

-const dataDir = path.join(__dirname, '..', 'data');
-if (!fs.existsSync(dataDir)) {
-  fs.mkdirSync(dataDir, { recursive: true });
+function buildPoolConfig() {
+  if (process.env.DATABASE_URL) {
+    return { connectionString: process.env.DATABASE_URL };
+  }
+  return {
+    host: process.env.PGHOST || '127.0.0.1',
+    port: parseInt(process.env.PGPORT || '5432', 10),
+    user: process.env.PGUSER || 'shop',
+    password: process.env.PGPASSWORD || 'shop',
+    database: process.env.PGDATABASE || 'shop',
+  };
 }

-const dbPath = path.join(dataDir, 'shop.db');
-const db = new Database(dbPath);
+const pool = new Pool(buildPoolConfig());

-db.pragma('journal_mode = WAL');
-db.pragma('foreign_keys = ON');
+pool.on('error', (err) => {
+  console.error('PostgreSQL pool error:', err.message);
+});

-db.exec(`
-  CREATE TABLE IF NOT EXISTS users (
-    id INTEGER PRIMARY KEY AUTOINCREMENT,
-    email TEXT NOT NULL UNIQUE COLLATE NOCASE,
-    password_hash TEXT NOT NULL,
-    name TEXT NOT NULL,
-    created_at TEXT NOT NULL DEFAULT (datetime('now'))
-  );
+async function query(text, params) {
+  return pool.query(text, params);
+}

-  CREATE TABLE IF NOT EXISTS categories (
-    id INTEGER PRIMARY KEY AUTOINCREMENT,
-    slug TEXT NOT NULL UNIQUE,
-    name TEXT NOT NULL
-  );
+async function initSchema() {
+  const schemaPath = path.join(__dirname, '..', 'postgres', 'init', '01_schema.sql');
+  const sql = fs.readFileSync(schemaPath, 'utf8');
+  await pool.query(sql);
+}

-  CREATE TABLE IF NOT EXISTS products (
-    id INTEGER PRIMARY KEY AUTOINCREMENT,
-    category_id INTEGER REFERENCES categories(id) ON DELETE SET NULL,
-    slug TEXT NOT NULL UNIQUE,
-    name TEXT NOT NULL,
-    description TEXT NOT NULL DEFAULT '',
-    price_cents INTEGER NOT NULL CHECK (price_cents >= 0),
-    stock INTEGER NOT NULL DEFAULT 0 CHECK (stock >= 0),
-    image_url TEXT,
-    created_at TEXT NOT NULL DEFAULT (datetime('now'))
-  );
-
-  CREATE TABLE IF NOT EXISTS orders (
-    id INTEGER PRIMARY KEY AUTOINCREMENT,
-    user_id INTEGER NOT NULL REFERENCES users(id),
-    status TEXT NOT NULL DEFAULT 'pending'
-      CHECK (status IN ('pending', 'paid', 'shipped', 'cancelled')),
-    total_cents INTEGER NOT NULL CHECK (total_cents >= 0),
-    customer_name TEXT NOT NULL,
-    customer_email TEXT NOT NULL,
-    customer_phone TEXT NOT NULL DEFAULT '',
-    address TEXT NOT NULL,
-    created_at TEXT NOT NULL DEFAULT (datetime('now'))
-  );
-
-  CREATE TABLE IF NOT EXISTS order_items (
-    id INTEGER PRIMARY KEY AUTOINCREMENT,
-    order_id INTEGER NOT NULL REFERENCES orders(id) ON DELETE CASCADE,
-    product_id INTEGER NOT NULL REFERENCES products(id),
-    quantity INTEGER NOT NULL CHECK (quantity > 0),
-    price_cents INTEGER NOT NULL CHECK (price_cents >= 0)
-  );
-
-  CREATE INDEX IF NOT EXISTS idx_products_category ON products(category_id);
-  CREATE INDEX IF NOT EXISTS idx_orders_user ON orders(user_id);
-`);
+async function checkConnection() {
+  await pool.query('SELECT 1');
+}

 function formatPrice(cents) {
  return (cents / 100).toLocaleString('ru-RU', {
@@ -73,4 +43,10 @@ function formatPrice(cents) {
  });
 }

-module.exports = { db, formatPrice, dbPath };
+module.exports = {
+  pool,
+  query,
+  initSchema,
+  checkConnection,
+  formatPrice,
+};
@@ -1,3 +1,6 @@
+const { query } = require('../db');
+const { asyncHandler } = require('../utils/asyncHandler');
+
 function requireAuth(req, res, next) {
  if (!req.session.userId) {
    const nextUrl = encodeURIComponent(req.originalUrl);
@@ -6,17 +9,17 @@ function requireAuth(req, res, next) {
  next();
 }

-function loadUser(req, res, next) {
+const loadUser = asyncHandler(async (req, res, next) => {
  if (req.session.userId) {
-    const { db } = require('../db');
-    const user = db
-      .prepare('SELECT id, email, name FROM users WHERE id = ?')
-      .get(req.session.userId);
-    res.locals.user = user || null;
+    const { rows } = await query(
+      'SELECT id, email, name FROM users WHERE id = $1',
+      [req.session.userId]
+    );
+    res.locals.user = rows[0] || null;
  } else {
    res.locals.user = null;
  }
  next();
-}
+});

 module.exports = { requireAuth, loadUser };
@@ -1,15 +1,16 @@
 const express = require('express');
 const bcrypt = require('bcryptjs');
-const { db } = require('../db');
+const { query, formatPrice } = require('../db');
 const { getCart, cartCount } = require('../cart');
 const { requireAuth } = require('../middleware/auth');
+const { asyncHandler } = require('../utils/asyncHandler');

 const router = express.Router();

 router.use((req, res, next) => {
  const cart = getCart(req);
  res.locals.cartCount = cartCount(cart);
-  res.locals.formatPrice = require('../db').formatPrice;
+  res.locals.formatPrice = formatPrice;
  next();
 });

@@ -18,7 +19,9 @@ router.get('/register', (req, res) => {
  res.render('register', { title: 'Регистрация', error: null, values: {} });
 });

-router.post('/register', (req, res) => {
+router.post(
+  '/register',
+  asyncHandler(async (req, res) => {
    const { name, email, password, password2 } = req.body;
    const values = { name, email };

@@ -46,13 +49,14 @@ router.post('/register', (req, res) => {

    const hash = bcrypt.hashSync(password, 10);
    try {
-    const r = db
-      .prepare('INSERT INTO users (email, password_hash, name) VALUES (?, ?, ?)')
-      .run(email.trim().toLowerCase(), hash, name.trim());
-    req.session.userId = r.lastInsertRowid;
+      const { rows } = await query(
+        'INSERT INTO users (email, password_hash, name) VALUES ($1, $2, $3) RETURNING id',
+        [email.trim().toLowerCase(), hash, name.trim()]
+      );
+      req.session.userId = rows[0].id;
      res.redirect('/');
    } catch (err) {
-    if (err.code === 'SQLITE_CONSTRAINT_UNIQUE') {
+      if (err.code === '23505') {
        return res.status(400).render('register', {
          title: 'Регистрация',
          error: 'Этот email уже зарегистрирован',
@@ -61,7 +65,8 @@ router.post('/register', (req, res) => {
      }
      throw err;
    }
-});
+  })
+);

 router.get('/login', (req, res) => {
  if (req.session.userId) return res.redirect('/account');
@@ -73,14 +78,17 @@ router.get('/login', (req, res) => {
  });
 });

-router.post('/login', (req, res) => {
+router.post(
+  '/login',
+  asyncHandler(async (req, res) => {
    const { email, password } = req.body;
    const next = req.body.next || '/';
    const values = { email };

-  const user = db
-    .prepare('SELECT * FROM users WHERE email = ?')
-    .get((email || '').trim().toLowerCase());
+    const { rows } = await query('SELECT * FROM users WHERE email = $1', [
+      (email || '').trim().toLowerCase(),
+    ]);
+    const user = rows[0];

    if (!user || !bcrypt.compareSync(password || '', user.password_hash)) {
      return res.status(401).render('login', {
@@ -93,7 +101,8 @@ router.post('/login', (req, res) => {

    req.session.userId = user.id;
    res.redirect(next.startsWith('/') ? next : '/');
-});
+  })
+);

 router.post('/logout', (req, res) => {
  req.session.destroy(() => {
@@ -101,16 +110,27 @@ router.post('/logout', (req, res) => {
  });
 });

-router.get('/account', requireAuth, (req, res) => {
-  const user = db
-    .prepare('SELECT id, email, name, created_at FROM users WHERE id = ?')
-    .get(req.session.userId);
+router.get(
+  '/account',
+  requireAuth,
+  asyncHandler(async (req, res) => {
+    const { rows } = await query(
+      'SELECT id, email, name, created_at FROM users WHERE id = $1',
+      [req.session.userId]
+    );
+    const user = rows[0];

-  const orderCount = db
-    .prepare('SELECT COUNT(*) AS n FROM orders WHERE user_id = ?')
-    .get(user.id).n;
+    const countResult = await query(
+      'SELECT COUNT(*)::int AS n FROM orders WHERE user_id = $1',
+      [user.id]
+    );

-  res.render('account', { title: 'Личный кабинет', user, orderCount });
+    res.render('account', {
+      title: 'Личный кабинет',
+      user,
+      orderCount: countResult.rows[0].n,
    });
+  })
+);

 module.exports = router;
@@ -1,12 +1,12 @@
 const express = require('express');
-const { db } = require('../db');
+const { checkConnection } = require('../db');

 const router = express.Router();

-router.get('/health', (_req, res) => {
+router.get('/health', async (_req, res) => {
  try {
-    db.prepare('SELECT 1').get();
-    res.json({ ok: true, service: 'shop' });
+    await checkConnection();
+    res.json({ ok: true, service: 'shop', database: 'postgresql' });
  } catch (err) {
    res.status(503).json({ ok: false, error: err.message });
  }
@@ -1,7 +1,8 @@
 const express = require('express');
-const { db, formatPrice } = require('../db');
+const { query, pool, formatPrice } = require('../db');
 const { getCart, cartCount, cartItems, cartTotal } = require('../cart');
 const { requireAuth } = require('../middleware/auth');
+const { asyncHandler } = require('../utils/asyncHandler');

 const router = express.Router();

@@ -16,7 +17,9 @@ router.use((req, res, next) => {
  next();
 });

-router.get('/', (req, res) => {
+router.get(
+  '/',
+  asyncHandler(async (req, res) => {
    const category = req.query.category || '';
    const q = (req.query.q || '').trim();

@@ -27,20 +30,21 @@ router.get('/', (req, res) => {
      WHERE p.stock > 0
    `;
    const params = [];
+    let n = 1;

    if (category) {
-    sql += ' AND c.slug = ?';
+      sql += ` AND c.slug = $${n++}`;
      params.push(category);
    }
    if (q) {
-    sql += ' AND (p.name LIKE ? OR p.description LIKE ?)';
-    const like = `%${q}%`;
-    params.push(like, like);
+      sql += ` AND (p.name ILIKE $${n} OR p.description ILIKE $${n})`;
+      params.push(`%${q}%`);
+      n++;
    }
    sql += ' ORDER BY p.name';

-  const products = db.prepare(sql).all(...params);
-  const categories = db.prepare('SELECT * FROM categories ORDER BY name').all();
+    const { rows: products } = await query(sql, params);
+    const { rows: categories } = await query('SELECT * FROM categories ORDER BY name');

    res.render('home', {
      title: 'Каталог',
@@ -49,17 +53,20 @@ router.get('/', (req, res) => {
      activeCategory: category,
      searchQuery: q,
    });
-});
+  })
+);

-router.get('/product/:slug', (req, res) => {
-  const product = db
-    .prepare(
+router.get(
+  '/product/:slug',
+  asyncHandler(async (req, res) => {
+    const { rows } = await query(
      `SELECT p.*, c.name AS category_name, c.slug AS category_slug
       FROM products p
       LEFT JOIN categories c ON c.id = p.category_id
-       WHERE p.slug = ?`
-    )
-    .get(req.params.slug);
+       WHERE p.slug = $1`,
+      [req.params.slug]
+    );
+    const product = rows[0];

    if (!product) {
      return res.status(404).render('error', {
@@ -70,43 +77,51 @@ router.get('/product/:slug', (req, res) => {
    }

    res.render('product', { title: product.name, product });
-});
+  })
+);

-router.get('/cart', (req, res) => {
+router.get(
+  '/cart',
+  asyncHandler(async (req, res) => {
    const cart = getCart(req);
-  const items = cartItems(db, cart);
+    const items = await cartItems(cart);
    const total = cartTotal(items);
-
    const errorMsg = req.query.error ? decodeURIComponent(String(req.query.error)) : null;
+
    res.render('cart', {
      title: 'Корзина',
      items,
      total,
      error: errorMsg,
    });
-});
+  })
+);

-router.post('/cart/add', (req, res) => {
+router.post(
+  '/cart/add',
+  asyncHandler(async (req, res) => {
    const productId = parseInt(req.body.product_id, 10);
    const quantity = Math.max(1, parseInt(req.body.quantity, 10) || 1);

-  const product = db
-    .prepare('SELECT id, stock FROM products WHERE id = ?')
-    .get(productId);
+    const { rows } = await query('SELECT id, stock FROM products WHERE id = $1', [
+      productId,
+    ]);
+    const product = rows[0];
    if (!product) {
      return res.redirect('/');
    }

    const cart = getCart(req);
    const current = cart[productId] || 0;
-  const nextQty = Math.min(product.stock, current + quantity);
-  cart[productId] = nextQty;
+    cart[productId] = Math.min(product.stock, current + quantity);

-  const redirect = req.body.redirect || '/cart';
-  res.redirect(redirect);
-});
+    res.redirect(req.body.redirect || '/cart');
+  })
+);

-router.post('/cart/update', (req, res) => {
+router.post(
+  '/cart/update',
+  asyncHandler(async (req, res) => {
    const cart = getCart(req);
    const updates = req.body.items || {};

@@ -120,16 +135,17 @@ router.post('/cart/update', (req, res) => {
        continue;
      }

-    const product = db
-      .prepare('SELECT stock FROM products WHERE id = ?')
-      .get(productId);
-    if (product) {
-      cart[productId] = Math.min(product.stock, quantity);
+      const { rows } = await query('SELECT stock FROM products WHERE id = $1', [
+        productId,
+      ]);
+      if (rows[0]) {
+        cart[productId] = Math.min(rows[0].stock, quantity);
      }
    }

    res.redirect('/cart');
-});
+  })
+);

 router.post('/cart/remove/:id', (req, res) => {
  const cart = getCart(req);
@@ -137,9 +153,12 @@ router.post('/cart/remove/:id', (req, res) => {
  res.redirect('/cart');
 });

-router.get('/checkout', requireAuth, (req, res) => {
+router.get(
+  '/checkout',
+  requireAuth,
+  asyncHandler(async (req, res) => {
    const cart = getCart(req);
-  const items = cartItems(db, cart);
+    const items = await cartItems(cart);
    if (items.length === 0) {
      return res.redirect('/cart');
    }
@@ -150,11 +169,15 @@ router.get('/checkout', requireAuth, (req, res) => {
      total: cartTotal(items),
      error: null,
    });
-});
+  })
+);

-router.post('/checkout', requireAuth, (req, res) => {
+router.post(
+  '/checkout',
+  requireAuth,
+  asyncHandler(async (req, res) => {
    const cart = getCart(req);
-  const items = cartItems(db, cart);
+    const items = await cartItems(cart);
    if (items.length === 0) {
      return res.redirect('/cart');
    }
@@ -170,74 +193,84 @@ router.post('/checkout', requireAuth, (req, res) => {
    }

    const total = cartTotal(items);
+    const client = await pool.connect();
+
+    try {
+      await client.query('BEGIN');

-  const placeOrder = db.transaction(() => {
      for (const item of items) {
-      const row = db
-        .prepare('SELECT stock FROM products WHERE id = ?')
-        .get(item.id);
-      if (!row || row.stock < item.quantity) {
+        const { rows } = await client.query(
+          'SELECT stock FROM products WHERE id = $1 FOR UPDATE',
+          [item.id]
+        );
+        if (!rows[0] || rows[0].stock < item.quantity) {
          throw new Error(`Недостаточно «${item.name}» на складе`);
        }
      }

-    const order = db
-      .prepare(
+      const orderResult = await client.query(
        `INSERT INTO orders (user_id, status, total_cents, customer_name, customer_email, customer_phone, address)
-         VALUES (?, 'pending', ?, ?, ?, ?, ?)`
-      )
-      .run(
+         VALUES ($1, 'pending', $2, $3, $4, $5, $6)
+         RETURNING id`,
+        [
          req.session.userId,
          total,
          name.trim(),
          email.trim(),
          (phone || '').trim(),
-        address.trim()
-      );
-
-    const insertItem = db.prepare(
-      `INSERT INTO order_items (order_id, product_id, quantity, price_cents)
-       VALUES (?, ?, ?, ?)`
-    );
-    const updateStock = db.prepare(
-      'UPDATE products SET stock = stock - ? WHERE id = ?'
+          address.trim(),
+        ]
      );
+      const orderId = orderResult.rows[0].id;

      for (const item of items) {
-      insertItem.run(order.lastInsertRowid, item.id, item.quantity, item.price_cents);
-      updateStock.run(item.quantity, item.id);
+        await client.query(
+          `INSERT INTO order_items (order_id, product_id, quantity, price_cents)
+           VALUES ($1, $2, $3, $4)`,
+          [orderId, item.id, item.quantity, item.price_cents]
+        );
+        await client.query('UPDATE products SET stock = stock - $1 WHERE id = $2', [
+          item.quantity,
+          item.id,
+        ]);
      }

-    return order.lastInsertRowid;
-  });
-
-  try {
-    const orderId = placeOrder();
+      await client.query('COMMIT');
      req.session.cart = {};
      res.redirect(`/orders/${orderId}?success=1`);
    } catch (err) {
+      await client.query('ROLLBACK');
      res.redirect(`/cart?error=${encodeURIComponent(err.message)}`);
+    } finally {
+      client.release();
    }
-});
+  })
+);

-router.get('/orders', requireAuth, (req, res) => {
-  const orders = db
-    .prepare(
+router.get(
+  '/orders',
+  requireAuth,
+  asyncHandler(async (req, res) => {
+    const { rows: orders } = await query(
      `SELECT id, status, total_cents, created_at
-       FROM orders WHERE user_id = ?
-       ORDER BY created_at DESC`
-    )
-    .all(req.session.userId);
+       FROM orders WHERE user_id = $1
+       ORDER BY created_at DESC`,
+      [req.session.userId]
+    );

    res.render('orders', { title: 'Мои заказы', orders });
-});
+  })
+);

-router.get('/orders/:id', requireAuth, (req, res) => {
-  const order = db
-    .prepare(
-      `SELECT * FROM orders WHERE id = ? AND user_id = ?`
-    )
-    .get(req.params.id, req.session.userId);
+router.get(
+  '/orders/:id',
+  requireAuth,
+  asyncHandler(async (req, res) => {
+    const { rows } = await query(
+      'SELECT * FROM orders WHERE id = $1 AND user_id = $2',
+      [req.params.id, req.session.userId]
+    );
+    const order = rows[0];

    if (!order) {
      return res.status(404).render('error', {
@@ -247,14 +280,13 @@ router.get('/orders/:id', requireAuth, (req, res) => {
      });
    }

-  const items = db
-    .prepare(
+    const { rows: items } = await query(
      `SELECT oi.*, p.name, p.slug, p.image_url
       FROM order_items oi
       JOIN products p ON p.id = oi.product_id
-       WHERE oi.order_id = ?`
-    )
-    .all(order.id);
+       WHERE oi.order_id = $1`,
+      [order.id]
+    );

    res.render('order', {
      title: `Заказ #${order.id}`,
@@ -262,6 +294,7 @@ router.get('/orders/:id', requireAuth, (req, res) => {
      items,
      success: req.query.success === '1',
    });
-});
+  })
+);

 module.exports = router;
@@ -1,20 +1,12 @@
-const { db } = require('./db');
+const { query } = require('./db');

-function runSeed() {
-  const count = db.prepare('SELECT COUNT(*) AS n FROM products').get().n;
-  if (count > 0) {
+async function runSeed() {
+  const { rows } = await query('SELECT COUNT(*)::int AS n FROM products');
+  if (rows[0].n > 0) {
    console.log('База уже содержит товары, пропуск seed.');
    return;
  }

-  const insertCategory = db.prepare(
-    'INSERT INTO categories (slug, name) VALUES (?, ?)'
-  );
-  const insertProduct = db.prepare(`
-    INSERT INTO products (category_id, slug, name, description, price_cents, stock, image_url)
-    VALUES (?, ?, ?, ?, ?, ?, ?)
-  `);
-
  const categories = [
    { slug: 'electronics', name: 'Электроника' },
    { slug: 'clothing', name: 'Одежда' },
@@ -22,10 +14,12 @@ function runSeed() {
  ];

  const categoryIds = {};
-  const seed = db.transaction(() => {
  for (const c of categories) {
-      const r = insertCategory.run(c.slug, c.name);
-      categoryIds[c.slug] = r.lastInsertRowid;
+    const r = await query(
+      'INSERT INTO categories (slug, name) VALUES ($1, $2) RETURNING id',
+      [c.slug, c.name]
+    );
+    categoryIds[c.slug] = r.rows[0].id;
  }

  const products = [
@@ -112,24 +106,33 @@ function runSeed() {
  ];

  for (const p of products) {
-      insertProduct.run(
+    await query(
+      `INSERT INTO products (category_id, slug, name, description, price_cents, stock, image_url)
+       VALUES ($1, $2, $3, $4, $5, $6, $7)`,
+      [
        categoryIds[p.cat],
        p.slug,
        p.name,
        p.description,
        p.price,
        p.stock,
-        p.image
+        p.image,
+      ]
    );
  }
-  });

-  seed();
-  console.log('Добавлено категорий:', categories.length, ', товаров: 8');
+  console.log('Добавлено категорий:', categories.length, ', товаров:', products.length);
 }

 module.exports = { runSeed };

 if (require.main === module) {
-  runSeed();
+  const { initSchema, pool } = require('./db');
+  initSchema()
+    .then(() => runSeed())
+    .then(() => pool.end())
+    .catch((err) => {
+      console.error(err);
+      process.exit(1);
+    });
 }
@@ -1,21 +1,26 @@
 const path = require('path');
 const express = require('express');
 const session = require('express-session');
-const SQLiteStore = require('connect-sqlite3')(session);
-
-require('./db');
-require('./seed').runSeed();
+const pgSession = require('connect-pg-simple')(session);

+const { pool, initSchema, checkConnection } = require('./db');
+const { runSeed } = require('./seed');
 const { loadUser } = require('./middleware/auth');
 const healthRoutes = require('./routes/health');
 const shopRoutes = require('./routes/shop');
 const authRoutes = require('./routes/auth');

-const app = express();
 const PORT = process.env.PORT || 3000;
 const HOST = process.env.HOST || '0.0.0.0';
 const isProduction = process.env.NODE_ENV === 'production';

+async function start() {
+  await checkConnection();
+  await initSchema();
+  await runSeed();
+
+  const app = express();
+
  if (process.env.TRUST_PROXY === '1' || isProduction) {
    app.set('trust proxy', 1);
  }
@@ -24,13 +29,16 @@ app.set('view engine', 'ejs');
  app.set('views', path.join(__dirname, 'views'));

  app.use(healthRoutes);
-
  app.use(express.static(path.join(__dirname, 'public')));
  app.use(express.urlencoded({ extended: true }));

  app.use(
    session({
-    store: new SQLiteStore({ db: 'sessions.db', dir: path.join(__dirname, '..', 'data') }),
+      store: new pgSession({
+        pool,
+        createTableIfMissing: true,
+        tableName: 'session',
+      }),
      secret: process.env.SESSION_SECRET || 'dev-secret-change-in-production',
      resave: false,
      saveUninitialized: false,
@@ -44,7 +52,6 @@ app.use(
  );

  app.use(loadUser);
-
  app.use('/', shopRoutes);
  app.use('/', authRoutes);

@@ -66,10 +73,16 @@ app.use((err, req, res, _next) => {
  });

  const server = app.listen(PORT, HOST, () => {
-  console.log(`Магазин: http://${HOST}:${PORT}`);
+    console.log(`Магазин: http://${HOST}:${PORT} (PostgreSQL)`);
  });

  server.on('error', (err) => {
    console.error('Не удалось запустить сервер:', err.message);
    process.exit(1);
  });
+}
+
+start().catch((err) => {
+  console.error('Ошибка запуска:', err.message);
+  process.exit(1);
+});
@@ -0,0 +1,7 @@
+function asyncHandler(fn) {
+  return (req, res, next) => {
+    Promise.resolve(fn(req, res, next)).catch(next);
+  };
+}
+
+module.exports = { asyncHandler };