This container can be pulled via:
  docker pull registry.opensuse.org/network/samba/containers/containers/opensuse/samba-toolbox:4.21
  docker pull registry.opensuse.org/network/samba/containers/containers/opensuse/samba-toolbox:4.21.0
  docker pull registry.opensuse.org/network/samba/containers/containers/opensuse/samba-toolbox:4.21.0-9.1067
  docker pull registry.opensuse.org/network/samba/containers/containers/opensuse/samba-toolbox:latest