This container can be pulled via:
  docker pull registry.opensuse.org/isv/rancher/elemental/staging/teal53/15.4/rancher/elemental-operator:1.3.4
  docker pull registry.opensuse.org/isv/rancher/elemental/staging/teal53/15.4/rancher/elemental-operator:1.3.4-21.37
  docker pull registry.opensuse.org/isv/rancher/elemental/staging/teal53/15.4/rancher/elemental-operator:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.