This container can be pulled via:
  docker pull registry.opensuse.org/home/defolos/bci/staging/sle-15-sp4/sle15-sp4-xouww/containerfile/suse/rmt-nginx:1.21
  docker pull registry.opensuse.org/home/defolos/bci/staging/sle-15-sp4/sle15-sp4-xouww/containerfile/suse/rmt-nginx:1.21-1.94
  docker pull registry.opensuse.org/home/defolos/bci/staging/sle-15-sp4/sle15-sp4-xouww/containerfile/suse/rmt-nginx:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.