Bash script to stop and delete all the docker containers and remove all the images

docker-clean-all

#!/bin/bash
echo 'stopping containers...'
while [[ -n "$( docker ps -a -q )" ]]
do
  docker stop $(docker ps -a -q)
done 
echo 'deleting containers...'
if [[ -n "$( docker ps -a -q )" ]] ; then
  docker rm $(docker ps -a -q)
fi
echo 'deleting images...'
if [[ -n "$( docker images -q )" ]] ; then
  docker rmi $(docker images -q)
fi