This container can be pulled via:
  docker pull registry.opensuse.org/home/crameleon/gdev/containers/containerfile/gdev/sle-keyserver:1.2
  docker pull registry.opensuse.org/home/crameleon/gdev/containers/containerfile/gdev/sle-keyserver:1.2.8.189
  docker pull registry.opensuse.org/home/crameleon/gdev/containers/containerfile/gdev/sle-keyserver:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.