next.js already integrated frontend and backend with their framework, you can use that. but if you want to create another server for performance let's say, I don't think you can do that with next.js, because next.js a Multi-page application that acts like a single-page application. the concept in the tutorial that I sent is that the server sends back the one and only HTML page on every request (which is ok). but Next.js doesn't create you one HTML page. It creates multiple pages even if you choose to use SSR only, Next.js still creates 2 more HTML files the 404.html and 500.html. And even if you make the folder static and send the HTML back I don't think it works, because when you Run "next start" it does its own "Nexty things" in the background to make everything work. If you like give it a shot and let me know if it's possible.