docker 设置对外暴露端口，docker-compose.yml expose local 8000 port to outsider 54321 port

设置对外暴露端口为：54321

dvadmin-django:
    build:
      context: .
      dockerfile: ./docker_env/django/Dockerfile
    container_name: dvadmin-django
    working_dir: /backend
    depends_on:
      - dvadmin-mysql
    environment:
      PYTHONUNBUFFERED: 1
      DATABASE_HOST: dvadmin-mysql
      TZ: Asia/Shanghai
    volumes:
      - ./backend:/backend
      - ./logs/log:/var/log
    ports:
      - "54321:8000"
    expose:
      - "8000"
    restart: always
    networks:
      network:
        ipv4_address: 177.8.0.12

https://www.jianshu.com/p/609f8403833a