Sure, it's Docker days on HN, all the cool guys are using Docker, but that's the guide everyone who had ever went to see what Docker is must have seen. Sorry for being harsh, but why submit it with a deceptive title?

Personally, I found this tutorial being a bit frustrating due to implementation limits. Particularly, because it's just type-correct-substring instead of achieve-the-result. For example, "docker search tut" fails and pasting text's limited to C-v. (However, I was surprised C-r worked. Neat!)