This container can be pulled via:
  docker pull registry.opensuse.org/home/favogt/releasetest/images/opensuse/tumbleweed:20210315
  docker pull registry.opensuse.org/home/favogt/releasetest/images/opensuse/tumbleweed:20210315.52.187
  docker pull registry.opensuse.org/home/favogt/releasetest/images/opensuse/tumbleweed:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.