Ask HN: Best way to manage a single server from Git in 2017?

I'd like to run a single, small VPS for some personal projects. I want the configuration of this server to be entirely driven from a git repository. What are the simplest tools for doing this in 2017?

Puppet? Chef? Ansible? I'm only running one server so I don't want to have to think about separate coordinator nodes, puppet masters or anything like that.

For any suggested solutions, are there rock solid tutorials on using them to manage a single instance?