This container can be pulled via:
  docker pull registry.opensuse.org/home/illuusio/images/images_15.4/opensuse/ilmi/buildbot-worker:15.4
  docker pull registry.opensuse.org/home/illuusio/images/images_15.4/opensuse/ilmi/buildbot-worker:3.5.0
  docker pull registry.opensuse.org/home/illuusio/images/images_15.4/opensuse/ilmi/buildbot-worker:3.5.0-1.1

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.