This container can be pulled via:
  docker pull registry.opensuse.org/isv/rancher/elemental/stable/teal53/15.4/rancher/seedimage-builder/5.3:1.2.2
  docker pull registry.opensuse.org/isv/rancher/elemental/stable/teal53/15.4/rancher/seedimage-builder/5.3:1.2.2-2.2

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.