This container can be pulled via:
  docker pull registry.opensuse.org/virtualization/containers/images/opensuse-leap-15.1/containers_ports/opensuse/leap:15.1
  docker pull registry.opensuse.org/virtualization/containers/images/opensuse-leap-15.1/containers_ports/opensuse/leap:15.1.1.281

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.