How to merge two servers together?

Question

Express.js

I read the article and decided to try to split the processing into two servers, but I have one domain address.
How can I make requests to the second server?
For example, one will work with the client side and return static.
And how can I set up receiving on the second requests in terms of sending messages so that they go already on the second past the first.

Answer 1

There is only one domain address - you can make subdomains, you can divide them by routes.
We take nginx and configure it as you want

Answer 2

If nginx - then you need to configure Nginx proxy
Or use a subdomain...