docker-compose-demo.yaml

version: '3.7'
services:
  # https://hub.docker.com/r/jwilder/whoami/
  #  thanks to the creator of nginx-proxy, that inspired this
  whoami1:
    image: jwilder/whoami
    networks:
      - www
    labels:
      caddy: "whoami1.example.com"
      caddy.reverse_proxy: "$$CONTAINER_IP:8000"
  whoami2:
    image: jwilder/whoami
    networks:
      - www
    labels:
      caddy: "whoami2.example.com"
      caddy.reverse_proxy: "$$CONTAINER_IP:8000"
      caddy.reverse_proxy.subdirective: "pass"
  # https://github.com/mendhak/docker-http-https-echo
  http-echo:
    image: mendhak/http-https-echo
    networks:
      - www
    labels:
      caddy: "http-echo.example.com"
      caddy.reverse_proxy: "$$CONTAINER_IP:80"
networks:
  www:
    external: true