version: '3.9'
services:
  postgres:
    container_name: db_postgres
    image: postgres
    hostname: postgres
    ports:
      - "5432:5432"
    environment:
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: postgres
      POSTGRES_DB: postgres
    volumes:
      - postgres-volume:/var/lib/postgresql/data
    restart: unless-stopped

    networks:
      - test-net
    
volumes:
  postgres-volume:

networks:
  test-net:
    external: true