This container can be pulled via:
  docker pull registry.opensuse.org/home/steven.hardy/isv/suse/edge/factory/images/kiwi-builder:10.2.29.1
  docker pull registry.opensuse.org/home/steven.hardy/isv/suse/edge/factory/images/kiwi-builder:10.2.29.1-1.1

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.