This container can be pulled via:
  docker pull registry.opensuse.org/home/nbelouin/factorytesting/images/kiwi-builder:10.1.16.0
  docker pull registry.opensuse.org/home/nbelouin/factorytesting/images/kiwi-builder:10.1.16.0-1.2

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.