This container can be pulled via:
  docker pull registry.opensuse.org/home/djz88/branches/suse/alp/workloads/tumbleweed_containerfiles/suse/alp/workloads/cockpit-ws:300.1
  docker pull registry.opensuse.org/home/djz88/branches/suse/alp/workloads/tumbleweed_containerfiles/suse/alp/workloads/cockpit-ws:300.1-7.54
  docker pull registry.opensuse.org/home/djz88/branches/suse/alp/workloads/tumbleweed_containerfiles/suse/alp/workloads/cockpit-ws:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.