Drop obsolete and broken images and intermediate containers

docker-drop-obsolete.sh

# this will remove almost all obsolete images including broken while building images and accompanied intermediate containers
# remains should be removed manually (which throw exceptions "image has dependent child images")
docker rm `docker ps -a | grep -P '\s+[0-9a-h]{12}\s+' | awk '{print $1}'`;
docker rmi `docker images | grep '<none>' | awk '{print $3}'`;
docker volume prune;