docker clean up stopped containers and remove unlinked images

docker-gc.sh

#!/usr/bin/sh

# info
docker system df         # Show docker disk usage, including space reclaimable by pruning

# automatic clean up
docker system prune      # will delete ALL unused data 
                         # (i.e. In order: containers stopped, volumes without containers and images with no containers)
# manual clean up
docker container prune   # Remove all stopped containers
docker volume prune      # Remove all unused volumes
docker image prune       # Remove unused images
docker system prune      # All of the above, in this order: containers, volumes, images