This container can be pulled via:
  docker pull registry.opensuse.org/home/nbelouin/factory157/charts/metal3:999.0.17_up0.12.7
  docker pull registry.opensuse.org/home/nbelouin/factory157/charts/metal3:999.0.17_up0.12.7-7.1

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.