This container can be pulled via:
  docker pull registry.opensuse.org/devel/bci/sle-15-sp7/containerfile/suse/kiosk/tigervnc-x11vnc:1
  docker pull registry.opensuse.org/devel/bci/sle-15-sp7/containerfile/suse/kiosk/tigervnc-x11vnc:1.14
  docker pull registry.opensuse.org/devel/bci/sle-15-sp7/containerfile/suse/kiosk/tigervnc-x11vnc:1.14-68.6
  docker pull registry.opensuse.org/devel/bci/sle-15-sp7/containerfile/suse/kiosk/tigervnc-x11vnc:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.