traefik/templates/docker.tmpl

[backends]{{range .Containers}}
    [backends.backend-{{getBackend .}}.servers.server-{{.Name | replace "/" "" | replace "." "-"}}]
    url = "{{getProtocol .}}://{{.NetworkSettings.IPAddress}}:{{getPort .}}"
    weight = {{getWeight .}}
{{end}}

[frontends]{{range $frontend, $containers := .Frontends}}
  [frontends."frontend-{{$frontend}}"]{{$container := index $containers 0}}
  backend = "backend-{{getBackend $container}}"
  passHostHeader = {{getPassHostHeader $container}}
    [frontends."frontend-{{$frontend}}".routes."route-frontend-{{$frontend}}"]
    rule = "{{getFrontendRule $container}}"
    value = "{{getFrontendValue $container}}"
{{end}}