This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/samba-server:4.20
  docker pull registry.opensuse.org/opensuse/samba-server:4.20.4
  docker pull registry.opensuse.org/opensuse/samba-server:4.20.4-4.43

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.