traefik-container/conf.d/whoami.toml

[http]
  [http.routers]
    [http.routers.whoami]
      entryPoints = ["http"]
      rule = "Host(`whoami.localhost`)"
      service = "whoami"
  [http.services]
    [http.services.whoami.loadBalancer]
      [[http.services.whoami.loadBalancer.servers]]
        url = "http://whoami/"