This container can be pulled via:
  docker pull registry.opensuse.org/isv/rancher/elemental/stable/teal53/15.4/rancher/elemental-teal-rt-channel/5.3:1.1.4
  docker pull registry.opensuse.org/isv/rancher/elemental/stable/teal53/15.4/rancher/elemental-teal-rt-channel/5.3:1.1.4-4.56
  docker pull registry.opensuse.org/isv/rancher/elemental/stable/teal53/15.4/rancher/elemental-teal-rt-channel/5.3:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.