This container can be pulled via:
  docker pull registry.opensuse.org/home/kukuk/container/container/opensuse/opendkim:2.11.0
  docker pull registry.opensuse.org/home/kukuk/container/container/opensuse/opendkim:2.11.0-8.827
  docker pull registry.opensuse.org/home/kukuk/container/container/opensuse/opendkim:latest