This container can be pulled via:
  docker pull registry.opensuse.org/home/dcassany/elemental/teal53/dev/experimental/rancher/elemental-operator/5.3:0.4.3
  docker pull registry.opensuse.org/home/dcassany/elemental/teal53/dev/experimental/rancher/elemental-operator/5.3:0.4.3-15.1
  docker pull registry.opensuse.org/home/dcassany/elemental/teal53/dev/experimental/rancher/elemental-operator/5.3:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.