This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/bci/kiwi:10.1-25.9
  docker pull registry.opensuse.org/opensuse/bci/kiwi:10.1.15
  docker pull registry.opensuse.org/opensuse/bci/kiwi:10.1.15-25.9

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.