Is rustus supposed to be exposed to the world or proxied by a "domain-specific" web service?

Did I understand well from this example:

That hooks could be used to authenticate file uploads?

I think it would be interesting as a narrative example to unroll a whole demo app that leverages rustus. Or give more context on why it was built?
Or for example, answer questions like "if I want to built a WeTransfer clone, what is the intended way to integrate rustus?"

If you're willing to give me a few pointers, I'd be glad to contribute something :)