Добавить install

install.md

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+# RemnaWave VPN Panel (Go)
+
+MVP panel on Go with:
+- main page
+- registration
+- authorization
+- personal cabinet
+- VPN config purchase via real external API and permanent key
+
+## One-click install/uninstall/reinstall (Ubuntu)
+
+Requirements:
+- Docker Engine + Docker Compose plugin installed
+- `bash` available (default on Ubuntu)
+
+First setup:
+1. Copy `.env.example` to `.env`
+2. Fill real values in `.env`:
+   - `API_BASE_URL`
+   - `API_BUY_PATH`
+   - `API_KEY`
+
+Make scripts executable once:
+
+```bash
+chmod +x install.sh uninstall.sh reinstall.sh
+```
+
+One-click commands:
+
+```bash
+./install.sh
+./uninstall.sh
+./reinstall.sh
+```
+
+- `install.sh` - build and start panel
+- `uninstall.sh` - stop and remove container(s)
+- `reinstall.sh` - full restart with rebuild
+
+After install: `http://localhost:8080`
+
+## Run locally without Docker
+
+1. Copy env file:
+   - `.env.example` -> `.env`
+2. Set real values:
+   - `API_BASE_URL`
+   - `API_BUY_PATH`
+   - `API_KEY`
+3. Start:
+
+```bash
+go run .
+```
+
+Open: `http://localhost:8080`
+
+## Run in Docker Compose manually
+
+```bash
+docker compose up --build
+```
+
+## External API contract expected
+
+POST `${API_BASE_URL}${API_BUY_PATH}`
+
+Headers:
+- `Authorization: Bearer <API_KEY>`
+- `Content-Type: application/json`
+
+Request JSON:
+
+```json
+{
+  "email": "user@example.com",
+  "plan": "monthly"
+}
+```
+
+Response JSON:
+
+```json
+{
+  "config": "vpn://...."
+}
+```