So i have this idea for an App and i need some configurations on the backend so obviously i decided to go with node.js because that's an option I'm more familiar with, but i need to have different configurations for different clients connected to the application. For example when a client visits the base url, it'll save that users information and use it whenever he visits other routes on the backend. But i can't seem to get that work using express, i have tried socket.io but that doesn't meet my needs. But how does the client side i.e browsers run different instances of the same application but my backend doesn't?... its still javascript, i don't want to use docker images or anything like that, i just want it on the same port is that possible?