feat: initial project scaffold

- React 19 + Vite + TailwindCSS frontend
- Express + TypeScript backend API
- PostgreSQL schema and migrations
- Docker Compose orchestration
- Drone CI/CD pipeline
- Pages: Dashboard, Servers, Containers, Services, Logs, Metrics, Settings

backend/.env.example

@@ -0,0 +1,17 @@
+PORT=3001
+NODE_ENV=development
+
+# Database
+DATABASE_URL=postgresql://postgres:postgres@db:5432/server_manager
+DB_HOST=db
+DB_PORT=5432
+DB_NAME=server_manager
+DB_USER=postgres
+DB_PASSWORD=postgres
+
+# JWT
+JWT_SECRET=your-secret-key-change-this-in-production
+JWT_EXPIRES_IN=7d
+
+# CORS
+CORS_ORIGIN=http://localhost:5173