This container can be pulled via:
  docker pull registry.opensuse.org/home/dancermak/bci/sle-15-sp3/containerfile/suse/rmt-nginx:1.19
  docker pull registry.opensuse.org/home/dancermak/bci/sle-15-sp3/containerfile/suse/rmt-nginx:1.19-1.1

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.