docker-compose.yml

services:
  # PostgreSQL Database Service
  database:
    image: postgres:15-alpine
    container_name: task_api_db
    restart: unless-stopped
    environment:
      POSTGRES_DB: task_api
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: root
      PGDATA: /var/lib/postgresql/data/pgdata
    volumes:
      # Persist database data
      - postgres_data:/var/lib/postgresql/data
      # Optional: Custom initialization scripts
      # - ./init-scripts:/docker-entrypoint-initdb.d
    ports:
      - "5432:5432"
    networks:
      - task_api_network
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U postgres -d task_api"]
      interval: 10s
      timeout: 5s
      retries: 5

  # Node.js Application Service
  app:
    build: 
      context: .
      dockerfile: Dockerfile
      target: production
    container_name: task_api_app
    restart: unless-stopped
    environment:
      - NODE_ENV=production
      - DATABASE_URL=postgresql://postgres:root@database:5432/task_api
      - PORT=3000
    ports:
      - "3000:3000"
    networks:
      - task_api_network
    depends_on:
      database:
        condition: service_healthy
    volumes:
      # Mount for development (optional - remove in production)
      - .env.keys:/app/.env.keys:ro
    healthcheck:
      test: ["CMD-SHELL", "curl -f http://localhost:3000/health || exit 1"]
      interval: 30s
      timeout: 10s
      retries: 3
      start_period: 40s

  # Optional: Database Administration Tool
  adminer:
    image: adminer:4.8.1
    container_name: task_api_adminer
    restart: unless-stopped
    ports:
      - "8080:8080"
    networks:
      - task_api_network
    depends_on:
      - database
    environment:
      ADMINER_DEFAULT_SERVER: database

# Named Volumes for Data Persistence
volumes:
  postgres_data:
    driver: local

# Custom Network for Service Communication
networks:
  task_api_network:
    driver: bridge