Redbean is awesome

Some examples of deployment in the wild would have helped?

Yep, for some reason my imagination is just not kicking in here. What can I do with embedded Lua in backend? I'm not familiar with Lua at all so I have no idea.

You can use the excellent fullmoon framework that takes care of a lot for you

https://github.com/pkulchenko/fullmoon

Then using lua is not much different than python/flask