This container can be pulled via:
  docker pull registry.opensuse.org/devel/bci/sle-15-sp5/images/bci/bci-micro:15.5
  docker pull registry.opensuse.org/devel/bci/sle-15-sp5/images/bci/bci-micro:15.5.169.1

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.