This container can be pulled via:
  docker pull registry.opensuse.org/devel/bci/sle-15-sp7/containerfile/bci/bci-init:15.7
  docker pull registry.opensuse.org/devel/bci/sle-15-sp7/containerfile/bci/bci-init:15.7-56.6

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.