This container can be pulled via:
  docker pull registry.opensuse.org/devel/bci/sle-15-sp7/containerfile/suse/samba-server:4.21
  docker pull registry.opensuse.org/devel/bci/sle-15-sp7/containerfile/suse/samba-server:4.21-62.7
  docker pull registry.opensuse.org/devel/bci/sle-15-sp7/containerfile/suse/samba-server:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.