This container can be pulled via:
  docker pull registry.opensuse.org/isv/rancher/elemental/staging/teal53/media/rancher/elemental-builder-image/5.3:0.11.1
  docker pull registry.opensuse.org/isv/rancher/elemental/staging/teal53/media/rancher/elemental-builder-image/5.3:0.11.1-7.38
  docker pull registry.opensuse.org/isv/rancher/elemental/staging/teal53/media/rancher/elemental-builder-image/5.3:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.