This container can be pulled via:
  docker pull registry.opensuse.org/home/dirkmueller/branches/devel/bci/sle-15-sp5/images/bci/bci-base:15.5
  docker pull registry.opensuse.org/home/dirkmueller/branches/devel/bci/sle-15-sp5/images/bci/bci-base:15.5.36.12.23
  docker pull registry.opensuse.org/home/dirkmueller/branches/devel/bci/sle-15-sp5/images/suse/sle15:15.5
  docker pull registry.opensuse.org/home/dirkmueller/branches/devel/bci/sle-15-sp5/images/suse/sle15:15.5.36.12.23

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.