Docker Orphan Cleaner

Lists Docker images that no container references (orphan images) and removes the selected ones in bulk, instead of one at a time from the Docker tab. Superseded pulls are included. Each orphan is classified as pinned, template referenced, compose referenced, tagged or untagged, and only untagged images are selected by default. Dry run is on by default and enforced on the server, deletions are never forced, and a scheduled run only ever removes untagged images past a minimum age. The reclaimable build cache is shown and can be pruned on request.