This script stops and removes all docker containers and their images

docker-factory-reset

#!/bin/bash
# WARNING: This script will remove all containers and images

echo -n "Do you want to factory-reset your docker (Y/n)? "
read answer
if [ "$answer" != "${answer#[Yy]}" ] ;then
    # Stop all containers
    docker stop $(docker ps -q)
    # Delete all containers
    docker rm $(docker ps -a -q)
    # Delete all images
    docker rmi $(docker images -q)
else
    echo Ok, bye
fi

Run this script via:
bash <(curl -sL https://bit.ly/2wYmHyf)