I would also be interested in how you set things up, but would I need to pay for the product to see the code?

H Anas, I see that you are trying to use react as frontend and Odoo as database (that is why you want to communicate between both using controllers)

A better way of achieving it is using controller public APIs (custom authentication can be implemented also).

We have created a fully functional react app as an Odoo module. It is published by the name of "docket_react_wiki" you can check.

If you want to collaborate, ping me at info@techfinna.com