version: '3.8'
services:
  postgres:
    image: postgres:latest
    container_name: postgres
    environment:
      POSTGRES_USER: user
      POSTGRES_PASSWORD: password
      POSTGRES_DB: mydatabase
    ports:
      - "5432:5432"
    volumes:
      - postgres_data:/var/lib/postgresql/data
    networks:
      - mynetwork

  app:
    build: .
    container_name: app
    environment:
      DATABASE_URL: "postgresql://user:password@postgres:5432/mydatabase"
    depends_on:
      - postgres
    networks:
      - mynetwork

networks:
  mynetwork:
    driver: bridge

volumes:
  postgres_data: