docker volume prune
Remove all volumes not used by at least one container
Remove all dangling (not tagged and is not associated with a container) images:
docker image prune
Remove all images which are not used by existing containers
docker image prune -a
Stop all running containers
docker stop $(docker ps -a -q)
Delete stopped containers
docker container prune
Cleans up dangling images, containers, volumes, and networks (ie, not associated with a container)
docker system prune
Additionally, remove any stopped containers and all unused images (not just dangling images)
docker system prune -a
