docker-clean

#!/bin/sh                                                                                                                                                                            

remove_dangling() {
   echo "Removing dangling images ..."
   docker rmi $(docker images -f dangling=true -q)
}

remove_stopped_containers() {
    echo "Removing stopped containers ..."
    docker rm $(docker ps -qa)
}

case $1 in
    images)
        remove_dangling
        ;;
    containers)
        read -p "Are you sure you want to remove all stopped containers?" -n 1 -r
        echo  #                                                                                                                                                                      
        if [[ $REPLY =~ ^[Yy]$ ]]
        then
            remove_stopped_containers
        fi

        ;;
    *)
        echo "                                                                                                                                                                       
usage: docker-clean containers|images                                                                                                                                                
    containers - removes all stopped containers it can.                                                                                                                              
    images - removes dangling (un-needed) image layers - images you no longer need                                                                                                   
"
        ;;
esac

Be sure to do what tupy suggested only after you get your current containers running so you don't pure volumes that they might be using if they weren't running ;-)