This container can be pulled via:
  docker pull registry.opensuse.org/devel/bci/sle-15-sp7/containerfile/suse/kiosk/xorg-client:21
  docker pull registry.opensuse.org/devel/bci/sle-15-sp7/containerfile/suse/kiosk/xorg-client:21-60.1
  docker pull registry.opensuse.org/devel/bci/sle-15-sp7/containerfile/suse/kiosk/xorg-client:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.