docker の不要な containers と images を一括で削除する

 docker system prune
WARNING! This will remove:
  - all stopped containers
  - all networks not used by at least one container
  - all dangling images
  - all dangling build cache

Are you sure you want to continue? [y/N] y

or

docker ps -a
docker ps -q --filter status=exited
docker ps -a | grep Exited | awk '{print $1}'
docker rm $(docker ps -q --filter status=exited)
docker rmi $(docker images | grep none | awk '{print $3}')