This container can be pulled via:
  docker pull registry.opensuse.org/devel/openqa/containers15.6/openqa_webui_lb:latest
  docker pull registry.opensuse.org/devel/openqa/containers15.6/opensuse/openqa-webui-lb:5.1741427870.33
  docker pull registry.opensuse.org/devel/openqa/containers15.6/opensuse/openqa-webui-lb:5.1741427870.33.8.817
  docker pull registry.opensuse.org/devel/openqa/containers15.6/opensuse/openqa-webui-lb:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.