Is it possible to deploy "next/react + node/express" web application into one server account, like heroku?
Using package npm i -D concurrently you can run your both projects on same server.Use this link fo reference https://dev.to/numtostr/running-react-and-node-js-in-one-shot-with-concurrently-2oac
Never used next, but I had a similar problem last night and tried like 5 different things to no avail.
Found this today and walked thru his demo and got a better understanding of what's going on and was able to restructure my project to get it to work. This post walks thru how to have Express serve your React project using heroku-postbuild.
Other things that tripped me up: I needed two package.json files (one for Express and one for React) and I didn't have my express app directory set to find index.html