This container can be pulled via:
  docker pull registry.opensuse.org/suse/templates/images/sle-15-sp4/containers/suse/example:9.0.2103
  docker pull registry.opensuse.org/suse/templates/images/sle-15-sp4/containers/suse/example:9.0.2103.1.155
  docker pull registry.opensuse.org/suse/templates/images/sle-15-sp4/containers/suse/example:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.