services:
  postgres:
    image: postgres:15-alpine 
    container_name: postgres
    environment:
      POSTGRES_HOST: postgres
      POSTGRES_USER: ${POSTGRES_USER:-postgres}
      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-postgres}  
      POSTGRES_DB: ${POSTGRES_DB:-postgres}        
    ports:
      - 5432:5432  
    volumes:
      - postgres_data:/var/lib/postgresql/data  
    restart: unless-stopped  
    #healthcheck:
    #  test: ["CMD-SHELL", "pg_isready -U postgres"]
    #  interval: 5s
    #  timeout: 5s
    #  retries: 5

volumes:
  postgres_data:  # Named volume for data persistence