This container can be pulled via:
  docker pull registry.opensuse.org/devel/unifiedcore/tumbleweed/containers/uc-base-os-kernel-default:0.0.1
  docker pull registry.opensuse.org/devel/unifiedcore/tumbleweed/containers/uc-base-os-kernel-default:0.0.1-4.2

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.