Sam DeLuca

Add a flag for "normalizing" docker tags to contain only valid characters

1

We sometimes use git branch names as docker tag names. git branch names can have / characters, while docker tags cannot. This PR adds a new boolean option `tags.normalize` which...

a less obtrusive version of the caption, since github doesnt really have captions

Now that we have a dockerfile, we can push it somewhere. Dockerhub (https://hub.docker.com/) is probably a reasonable place since it's free for open source projects and the de facto standard....