This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/leap/15.5/images/totest/containers/opensuse/leap:15.5
  docker pull registry.opensuse.org/opensuse/leap/15.5/images/totest/containers/opensuse/leap:15.5.6.5

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.