This container can be pulled via:
  docker pull registry.opensuse.org/isv/suse/edge/sles16.1/totest/images/sles16.1/edge-image-builder:1.3.3.1
  docker pull registry.opensuse.org/isv/suse/edge/sles16.1/totest/images/sles16.1/edge-image-builder:1.3.3.1-1.4

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.