The server is on localhost:port, the client is also on localhost:another port, send requests to the ip of the computer with the server and the client, from another computer on the local network?

Question

Computer networks

Now there is a client on localhost:3078 that communicates with servers on localhost:3088,3089 and so on.
On the local network from another computer, I can access this client through the client-computer-address:3078.
The question is, in what way / ways can you make the client send requests not to localhost: the right port, but to the right ip of the computer on which the client and server are?
is it possible to somehow set an address on the local network that will work for all computers, for example, some local-site.local/com ?
Maybe some nginx ohm can somehow configure all this?