traefik.file.provider.yml

http:
  routers:
    apache2:
      rule: Host(`localhost`)
      service: apache2
      entryPoints:
        - websecure
      tls:
        certresolver: myresolver
  services:
    apache2:
      loadBalancer:
        passHostHeader: true
        servers:
          - url: http://172.21.0.1:81