This container can be pulled via:
  docker pull registry.opensuse.org/home/dcassany/unifiedcore/tumbleweed/containers/k3s:1.34
  docker pull registry.opensuse.org/home/dcassany/unifiedcore/tumbleweed/containers/k3s:1.34_1.16-1.30

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.