http: 
  routers:
    traefik-secure:
      rule: Host(`urmel.de`)
      entryPoints:
        - https
      tls:
        domains:
          - main: "arpa.urmel.de"
            sans: 
              - "*.arpa.urmel.de"
          - main: "urmel.de"
            sans: 
              - "*.urmel.de"
  services:
    unknown-page:
      loadbalancer:
        server:
          - url: "somedomain.invalide"
  middlewares:
    traefik-auth:
      basicauth:
        users: '{{ env "AUTH_STRING" }}'