This container can be pulled via:
  docker pull registry.opensuse.org/home/jeff_mahoney/branches/network/samba/containers/containers/opensuse/samba-server:4.21
  docker pull registry.opensuse.org/home/jeff_mahoney/branches/network/samba/containers/containers/opensuse/samba-server:4.21.3
  docker pull registry.opensuse.org/home/jeff_mahoney/branches/network/samba/containers/containers/opensuse/samba-server:4.21.3-16.4
  docker pull registry.opensuse.org/home/jeff_mahoney/branches/network/samba/containers/containers/opensuse/samba-server:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.