This container can be pulled via:
  docker pull registry.opensuse.org/home/dcassany/fix_chart/containers/rancher/elemental-channel/sl-micro:6.1-rt
  docker pull registry.opensuse.org/home/dcassany/fix_chart/containers/rancher/elemental-channel/sl-micro:6.1-rt-1.1

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.