How to publish/push Dockerfile?

Question

I know how to publish/push docker image but I'm completely thrown off on how one can publish Dockerfile. For e.g. https://hub.docker.com/r/tutum/node/~/dockerfile/

Currently, I'm pushing images with the following command:-

docker push myusername/myimage

Answer 1

Looks like pushing/publishing Dockerfile is actually called "Automating Builds" which you simply push it to either github or bitbucket. And after you link your github repo which has Dockerfile it will show up automatically. More info here