This container can be pulled via:
  docker pull registry.opensuse.org/home/dcassany/elementaldev/containers_next/rancher/elemental-teal-iso/5.3:1.1.4
  docker pull registry.opensuse.org/home/dcassany/elementaldev/containers_next/rancher/elemental-teal-iso/5.3:1.1.4-1.55
  docker pull registry.opensuse.org/home/dcassany/elementaldev/containers_next/rancher/elemental-teal-iso/5.3:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.