This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/rmt-nginx:1.27
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/rmt-nginx:1.27-13.21
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/opensuse/rmt-nginx:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.