This container can be pulled via:
  docker pull registry.opensuse.org/devel/bci/sle-15-sp7/images/suse/registry:2.8
  docker pull registry.opensuse.org/devel/bci/sle-15-sp7/images/suse/registry:2.8-61.3

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.