docker-compose.yml

version: "3"

services:
  reverse-proxy:
    # The official v2 Traefik docker image
    image: traefik:v2.6
    ports:
      # The HTTP port
      - "80:80"
      # The Web UI (enabled by --api.insecure=true)
      - "8080:8080"
    networks:
      - web
    volumes:
      # So that Traefik can listen to the Docker events
      - /var/run/docker.sock:/var/run/docker.sock

    container_name: traefik
    command:
      #- "--log.level=DEBUG"
      - "--api.insecure=true"
      - "--providers.docker=true"
      - "--providers.docker.exposedbydefault=false"
      - "--providers.docker.network=web"
      - "--entrypoints.web.address=:80"
      - "--providers.docker.watch=true"
      - "--providers.docker.defaultrule=HostRegexp(`{subdomain:[a-z0-9]+}.${TRAEFIK_DOMAIN}`)"

  whoami:
    # A container that exposes an API to show its IP address
    image: traefik/whoami
    networks:
      - web
    labels:
      # Explicitly tell Traefik to expose this container
      - "traefik.enable=true"
      # The domain the service will respond to
      - "traefik.http.routers.whoami.rule=Host(`whoami.${TRAEFIK_DOMAIN}`)"
      # Allow request only from the predefined entry point named "web"
      - "traefik.http.routers.whoami.entrypoints=web"

networks:
  web:
    external: true