This container can be pulled via:
  docker pull registry.opensuse.org/devel/bci/sle-15-sp3/containerfile/suse/rmt-server:2.9
  docker pull registry.opensuse.org/devel/bci/sle-15-sp3/containerfile/suse/rmt-server:2.9-20.26

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.