Add support for Render

[funkyrailroad]

This is ~almost ready to go~ moving along for the configuration-only deployment, but feel free to start giving some feedback.

https://github.com/funkyrailroad/dsd-render

One thing to note is that the production settings are handled in a different file like in the CodeRed plugin, as opposed to in the same file like the Fly.io plugin. (I named it settings_render.py)

There's also some more work to do with the tests e.g. getting them to pass for the other package managers and adding tests for the render-specific files.

It's also just using the sqlite3 db locally in the instance, and that is deleted on each new deploy.

[ehmatthes]

Okay, thanks for the update! I'm going to respond over there, but I'll leave this issue open for a bit so people can find your plugin if they see this open issue.

I'm really excited about Render support!