hb.wind

$ curl -H Host:whoami.docker.localhost http://127.0.0.1

Gateway Timeout

解决方法：
确保多个容器在同一个network下面
检查docker network ls
如果不指定network的名字，则默认是以docker-compose.yml所在文件夹的名字为前缀

底部networks那里增加name字段：

networks:
    web:
        name: web
    traefik:
        name: traefik

$ docker-compose up -d

ERROR: The Compose file './docker-compose.yml' is invalid because:
networks.traefik value Additional properties are not allowed ('name' was unexpected)
networks.web value Additional properties are not allowed ('name' was unexpected)

解决方法：version: '3.7'