This container can be pulled via:
  docker pull registry.opensuse.org/isv/rancher/elemental/staging/containers/rancher/elemental-rt-channel:1.6.2
  docker pull registry.opensuse.org/isv/rancher/elemental/staging/containers/rancher/elemental-rt-channel:1.6.2-2.260
  docker pull registry.opensuse.org/isv/rancher/elemental/staging/containers/rancher/elemental-rt-channel:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.