Does this markdown documentation tool exist?

Does this markdown documentation tool exist?

So today I was looking into options for adding a documentation/knowledge base for plausible.io

I can write markdown fluidly so the fastest option would be to use a markdown-based documentation.

There are plenty of open-source site generators and what not, but I don't want to deal with hosting this myself. I would gladly pay $5-10/month right now for a solution where I just push some markdown files to my github repo and get a nice looking documentation site automatically.

The ideal product would:

1. Let me store my documentation on Github as raw markdown files
2. When I push an update to master, this thing would pick up the change, build HTML docs from markdown, and deploy it to its own hosting system.
3. Looks beautiful and is searchable, of course.
4. I can point docs.plausible.io to it and live happily ever after.

The closest to this is Gitbook I think? However, their plans start from $35/month which is pretty steep. And I don't like that they went away from git/github as the central model. I'd prefer to have the raw markdown files in a github repo I own.

What do you think? Am I missing something? Would you use a product like this?

#idea-validation