This container can be pulled via:
  docker pull registry.opensuse.org/isv/rancher/elemental/maintenance/5.5/charts/rancher/elemental-operator-chart:1.5.3
  docker pull registry.opensuse.org/isv/rancher/elemental/maintenance/5.5/charts/rancher/elemental-operator-chart:1.5.3-4.5
  docker pull registry.opensuse.org/isv/rancher/elemental/maintenance/5.5/charts/rancher/elemental-operator-chart:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.