This container can be pulled via:
  docker pull registry.opensuse.org/home/dirkmueller/bci/cr/sle-15-sp5/images/bci/bci-busybox:15.5
  docker pull registry.opensuse.org/home/dirkmueller/bci/cr/sle-15-sp5/images/bci/bci-busybox:15.5.1.19
  docker pull registry.opensuse.org/home/dirkmueller/bci/cr/sle-15-sp5/images/bci/bci-busybox:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.