How to properly configure Next.js as a frontend and Express app as a backend?

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Currently I have create-react-app for frontend and express server for backend. In package.json of my create-react-app I use proxy like this "proxy": "http://localhost:5000". I need to achive the same thing for Next.js app with the same express server.

I just want to be able to use my express server instead of API routes built in Next.js and proxy it like I do in create-react-app.

Do I need to create custom Next.js server even though i'm not changing any of it's functionality? How to do this properly?

next.js reactjs express node.js
1 Answers

yes you have to add custom server in next js

install express js then add file server.js in root directory of next js project

const express = require('express')
const next = require('next')
const bodyParser = require('body-parser')

const dev = process.env.NODE_ENV !== 'production'
const app = next({ dev })
const handle = app.getRequestHandler()

app.prepare().then(() => {
  const server = express()

  server.use(bodyParser.json())
// add custom path here
// server.post('/request/custom', custom);

  
  server.get('*', (req, res) => {
    return handle(req, res)
  })

  server.listen(3000, (err) => {
    if (err) throw err
    console.log('Ready on http://localhost:5000')
  })
})

after that change package.json file script section

"scripts": {
    "dev": "node server.js",
    "build": "next build",
    "start": "NODE_ENV=production node server.js",
}
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