This container can be pulled via:
  docker pull registry.opensuse.org/virtualization/containers/images/opensuse-leap-15.3/containers/opensuse/leap:15.3
  docker pull registry.opensuse.org/virtualization/containers/images/opensuse-leap-15.3/containers/opensuse/leap:15.3.2.431

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.