nginx-proxy-auto-docker/test/test_http_port.yml

services:
  web1:
    image: web
    expose:
      - "81"
    environment:
      WEB_PORTS: "81"
      VIRTUAL_HOST: "*.nginx-proxy.tld"

  sut:
    image: nginxproxy/nginx-proxy:test
    volumes:
      - /var/run/docker.sock:/tmp/docker.sock:ro
    environment:
      HTTP_PORT: 8080