This container can be pulled via:
  docker pull registry.opensuse.org/devel/openqa/containers/opensuse/openqa-client:5.1778582900.5
  docker pull registry.opensuse.org/devel/openqa/containers/opensuse/openqa-client:5.1778582900.5.10.1977
  docker pull registry.opensuse.org/devel/openqa/containers/opensuse/openqa-client:latest
  docker pull registry.opensuse.org/devel/openqa/containers/tumbleweed:client

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.