This container can be pulled via:
  docker pull registry.opensuse.org/isv/suse/edge/clusterapi/containerfile/cluster-api-provider-metal3:1.7.1
  docker pull registry.opensuse.org/isv/suse/edge/clusterapi/containerfile/cluster-api-provider-metal3:1.7.1-3.1
  docker pull registry.opensuse.org/isv/suse/edge/clusterapi/containerfile/cluster-api-provider-metal3:v1.7.1

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.