如何从Docker容器访问主机端口？

Question

如何从docker容器（web）访问主机端口？

我的docker-compose.yml文件：

version: '3'

services:
  db:
    image: postgres
    restart: always
    ports:
      - 5432:5432
    environment:
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: password
      POSTGRES_DB: postgres
  web:
    build: .
    command: python server.py
    volumes:
      - .:/code
    ports:
      - 5000:5000
    depends_on:
      - db