How to connect back and front on the same domain?

Question

Python

I am, so to speak, new in all this, I am writing something like the weather on aiohttp and react, the api is already there, there is no front yet, but still.
I run Python from the console, say on port 8080, so the react is launched from the console, only on a different port, and I need them to run on the same port so that the react page is rendered, but also for ayohttp to work.
Here's how to do it, specifically for this case and in general in general?

Answer 1

All requests to urls starting with /api are sent by the web server to the back, and all the rest to the front.