This container can be pulled via:
  docker pull registry.opensuse.org/network/samba/containers/containers/opensuse/samba-ad-server:4.21
  docker pull registry.opensuse.org/network/samba/containers/containers/opensuse/samba-ad-server:4.21.1
  docker pull registry.opensuse.org/network/samba/containers/containers/opensuse/samba-ad-server:4.21.1-13.1239
  docker pull registry.opensuse.org/network/samba/containers/containers/opensuse/samba-ad-server:latest