dockerhost-on-demand

docker run -ti -p 20022:22 --privileged noisy/docker-on-demand

Type:

ssh root@localhost -p 20022
#password: docker

Each time when you will login via ssh, you will start and login directly to fresh container of docker inside docker-on-demand container, which is capable of running next docker containers :)

This is madness!

No, this is... optimization. To be precize, bandwidth optimization in case when you are asking 30 people during docker workshops to pull some images :)