diff --git a/README.md b/README.md
index a64aa9c..c6ab528 100644
--- a/README.md
+++ b/README.md
@@ -170,21 +170,14 @@ DATABASE_URL=postgresql://shop:shop@127.0.0.1:5432/shop
 ## Запуск как служба (systemd)
 
 ```bash
-cp /opt/shop/shop10/deploy/shop.service /etc/systemd/system/shop.service
-
 cd /opt/shop/shop10
-cp .env.example .env   # при первой установке
-# Заполните SESSION_SECRET и DATABASE_URL
-
-npm install --omit=dev
-
-# Не делайте chown -R www-data на весь /opt/shop (ломает git pull)
-systemctl daemon-reload
-systemctl enable shop
-systemctl start shop
+cp .env.example .env   # при первой установке — SESSION_SECRET, DATABASE_URL
+sudo bash scripts/install-shop-service.sh
 journalctl -u shop -f
 ```
 
+Не делайте `chown -R www-data` на весь каталог репозитория (ломает `git pull`).
+
 `EnvironmentFile=/opt/shop/shop10/.env` должен содержать `DATABASE_URL`.
 
 ---
diff --git a/scripts/install-shop-service.sh b/scripts/install-shop-service.sh
new file mode 100644
index 0000000..c2e761e
--- /dev/null
+++ b/scripts/install-shop-service.sh
@@ -0,0 +1,76 @@
+#!/bin/bash
+# Установка systemd-службы shop (после git clone и .env)
+# sudo bash scripts/install-shop-service.sh
+set -euo pipefail
+
+if [ "$(id -u)" -ne 0 ]; then
+  echo "Запустите от root: sudo bash scripts/install-shop-service.sh"
+  exit 1
+fi
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+source "$SCRIPT_DIR/shop-root.sh"
+
+echo "=== Установка службы shop ==="
+echo "Каталог: $SHOP_ROOT"
+
+if [ ! -f "$SHOP_ROOT/package.json" ]; then
+  echo "Ошибка: нет package.json в $SHOP_ROOT"
+  exit 1
+fi
+
+if [ ! -f "$SHOP_ROOT/.env" ]; then
+  if [ -f "$SHOP_ROOT/.env.example" ]; then
+    cp "$SHOP_ROOT/.env.example" "$SHOP_ROOT/.env"
+    echo "Создан .env из .env.example — отредактируйте SESSION_SECRET и DATABASE_URL"
+  else
+    echo "Ошибка: нет .env — создайте из .env.example"
+    exit 1
+  fi
+fi
+
+if ! grep -q '^DATABASE_URL=' "$SHOP_ROOT/.env"; then
+  echo "ВНИМАНИЕ: в .env нет DATABASE_URL"
+fi
+
+if ! command -v node >/dev/null; then
+  echo "Ошибка: node не найден"
+  exit 1
+fi
+
+NODE_BIN=$(command -v node)
+echo "Node: $NODE_BIN ($($NODE_BIN -v))"
+
+npm install --omit=dev --prefix "$SHOP_ROOT"
+
+cp -f "$SHOP_ROOT/deploy/shop.service" /etc/systemd/system/shop.service
+sed -i "s|WorkingDirectory=.*|WorkingDirectory=${SHOP_ROOT}|" /etc/systemd/system/shop.service
+sed -i "s|EnvironmentFile=.*|EnvironmentFile=${SHOP_ROOT}/.env|" /etc/systemd/system/shop.service
+sed -i "s|ExecStart=.*|ExecStart=${NODE_BIN} src/server.js|" /etc/systemd/system/shop.service
+
+# www-data должен читать код (не меняем владельца всего дерева — только доступ на чтение)
+chmod -R a+rX "$SHOP_ROOT" 2>/dev/null || true
+if ! sudo -u www-data test -r "$SHOP_ROOT/package.json"; then
+  echo "Предупреждение: www-data не читает $SHOP_ROOT — проверьте права каталога"
+fi
+
+if command -v pg_isready >/dev/null; then
+  systemctl enable postgresql 2>/dev/null || true
+  systemctl start postgresql 2>/dev/null || true
+fi
+
+systemctl daemon-reload
+systemctl enable shop
+systemctl restart shop
+
+sleep 2
+if curl -sf http://127.0.0.1:3000/health; then
+  echo ""
+  echo "OK — служба shop запущена"
+  systemctl status shop --no-pager -l | head -12
+  systemctl reload caddy 2>/dev/null || true
+else
+  echo "shop не отвечает на :3000"
+  journalctl -u shop -n 25 --no-pager
+  exit 1
+fi
diff --git a/scripts/server-update.sh b/scripts/server-update.sh
index 6153907..3183515 100644
--- a/scripts/server-update.sh
+++ b/scripts/server-update.sh
@@ -33,16 +33,24 @@ if command -v pg_isready >/dev/null; then
   }
 fi
 
-if systemctl is-active --quiet shop 2>/dev/null; then
+if [ -f /etc/systemd/system/shop.service ]; then
+  systemctl daemon-reload
   systemctl restart shop
-  sleep 1
-  curl -sf http://127.0.0.1:3000/health && echo || {
-    echo "shop не отвечает — смотрите: journalctl -u shop -n 30"
+  sleep 2
+  if curl -sf http://127.0.0.1:3000/health; then
+    echo ""
+    echo "OK"
+    systemctl reload caddy 2>/dev/null || true
+  else
+    echo "shop не отвечает — journalctl -u shop -n 30"
     exit 1
-  }
-  systemctl reload caddy 2>/dev/null || true
-  echo "OK"
+  fi
+elif [ "$(id -u)" -eq 0 ]; then
+  echo "Служба shop не установлена — устанавливаем..."
+  bash "$SCRIPT_DIR/install-shop-service.sh"
 else
-  echo "Служба shop не установлена. См. deploy/shop.service"
-  echo "WorkingDirectory в unit должен совпадать с: $SHOP_ROOT"
+  echo "Служба shop не установлена. Выполните от root:"
+  echo "  sudo bash $SHOP_ROOT/scripts/install-shop-service.sh"
+  echo "WorkingDirectory: $SHOP_ROOT"
+  exit 1
 fi
diff --git a/wiki/Troubleshooting.md b/wiki/Troubleshooting.md
index ec5c77a..b59f085 100644
--- a/wiki/Troubleshooting.md
+++ b/wiki/Troubleshooting.md
@@ -52,6 +52,22 @@ cp /opt/shop/shop10.bak.*/.env /opt/shop/shop10/.env 2>/dev/null || cp /opt/shop
 bash /opt/shop/shop10/scripts/server-update.sh
 ```
 
+## Служба shop не установлена
+
+Код обновился, но systemd unit не настроен:
+
+```bash
+cd /opt/shop/shop10
+sudo bash scripts/install-shop-service.sh
+```
+
+Проверка:
+
+```bash
+systemctl status shop
+curl -s http://127.0.0.1:3000/health
+```
+
 ## scripts/server-update.sh: No such file or directory
 
 Вы не в каталоге репозитория или клон в подпапке (например `/opt/shop/shop10`):