This container can be pulled via:
  docker pull registry.opensuse.org/devel/openqa/containers16.0/openqa_webui_lb:latest
  docker pull registry.opensuse.org/devel/openqa/containers16.0/opensuse/openqa-webui-lb:5.1770994959.5
  docker pull registry.opensuse.org/devel/openqa/containers16.0/opensuse/openqa-webui-lb:5.1770994959.5.9.5
  docker pull registry.opensuse.org/devel/openqa/containers16.0/opensuse/openqa-webui-lb:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.