Docker Compose Setup

Create a docker-compose setup for my Node.js app with:
- PostgreSQL database with persistent storage
- Redis for session caching
- Nginx reverse proxy with SSL termination
- A Celery-like background worker process
- Development setup with hot reloading

services:
  nginx:
    image: nginx:1.25-alpine
    ports:
      - "80:80"
      - "443:443"
    volumes:
      - ./nginx/nginx.conf:/etc/nginx/nginx.conf:ro
      - ./nginx/certs:/etc/nginx/certs:ro
    depends_on:
      app:
        condition: service_healthy
    networks:
      - frontend
    restart: unless-stopped
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost/health"]
      interval: 30s
      timeout: 5s
      retries: 3

  app:
    build:
      context: .
      dockerfile: Dockerfile
    environment:
      NODE_ENV: production
      DATABASE_URL: postgres://appuser:${DB_PASSWORD}@postgres:5432/myapp
      REDIS_URL: redis://redis:6379
      SESSION_SECRET: ${SESSION_SECRET}
    depends_on:
      postgres:
        condition: service_healthy
      redis:
        condition: service_healthy
    networks:
      - frontend
      - backend
    restart: unless-stopped
    healthcheck:
      test: ["CMD", "node", "-e", "fetch('http://localhost:3000/health').then(r => r.ok ? process.exit(0) : process.exit(1))"]
      interval: 15s
      timeout: 5s
      retries: 3
      start_period: 30s

  worker:
    build:
      context: .
      dockerfile: Dockerfile
    command: node worker.js
    environment:
      DATABASE_URL: postgres://appuser:${DB_PASSWORD}@postgres:5432/myapp
      REDIS_URL: redis://redis:6379
    depends_on:
      postgres:
        condition: service_healthy
      redis:
        condition: service_healthy
    networks:
      - backend
    restart: unless-stopped

  postgres:
    image: postgres:16-alpine
    environment:
      POSTGRES_DB: myapp
      POSTGRES_USER: appuser
      POSTGRES_PASSWORD: ${DB_PASSWORD}
    volumes:
      - postgres_data:/var/lib/postgresql/data
      - ./init.sql:/docker-entrypoint-initdb.d/init.sql:ro
    networks:
      - backend
    restart: unless-stopped
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U appuser -d myapp"]
      interval: 10s
      timeout: 5s
      retries: 5

  redis:
    image: redis:7-alpine
    command: redis-server --appendonly yes --maxmemory 256mb --maxmemory-policy allkeys-lru
    volumes:
      - redis_data:/data
    networks:
      - backend
    restart: unless-stopped
    healthcheck:
      test: ["CMD", "redis-cli", "ping"]
      interval: 10s
      timeout: 3s
      retries: 3

volumes:
  postgres_data:
  redis_data:

networks:
  frontend:
  backend:

services:
  app:
    build:
      context: .
      dockerfile: Dockerfile
    environment:
      DATABASE_URL: postgres://appuser:${DB_PASSWORD}@postgres:5432/myapp
      REDIS_URL: redis://redis:6379
    depends_on:
      postgres:
        condition: service_healthy
    networks:
      - backend

  postgres:
    image: postgres:16-alpine
    environment:
      POSTGRES_DB: myapp
      POSTGRES_USER: appuser
      POSTGRES_PASSWORD: ${DB_PASSWORD}
    volumes:
      - postgres_data:/var/lib/postgresql/data
    networks:
      - backend
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U appuser -d myapp"]
      interval: 10s
      timeout: 5s
      retries: 5

volumes:
  postgres_data:

networks:
  backend:

services:
  app:
    build:
      target: development
    ports:
      - "3000:3000"
      - "9229:9229"   # Node.js debug port
    volumes:
      - .:/app
      - /app/node_modules
    environment:
      NODE_ENV: development
      DEBUG: "app:*"
    command: npm run dev

  postgres:
    ports:
      - "5432:5432"   # Expose DB to host for local tooling

services:
  app:
    build:
      target: production
    restart: unless-stopped
    environment:
      NODE_ENV: production
    deploy:
      resources:
        limits:
          cpus: "1.0"
          memory: 512M
        reservations:
          cpus: "0.5"
          memory: 256M
    logging:
      driver: json-file
      options:
        max-size: "10m"
        max-file: "3"

  postgres:
    restart: unless-stopped
    deploy:
      resources:
        limits:
          cpus: "2.0"
          memory: 1G