How to set up express in nuxt?

Question

Express.js

Since right now you can’t immediately put express on nuxt , you have to install it manually, well, according to the advice of one person, I take and create a server folder in the root , in which I will have index.js , where all the settings are

const consola = require('consola')
const { Nuxt, Builder } = require('nuxt')
const app = require('./app')

// Import and Set Nuxt.js options
const config = require('../nuxt.config.js')
config.dev = process.env.NODE_ENV !== 'production'

async function start () {
  // Init Nuxt.js
  const nuxt = new Nuxt(config)

  const { host, port } = nuxt.options.server

  await nuxt.ready()
  // Build only in dev mode
  if (config.dev) {
    const builder = new Builder(nuxt)
    await builder.build()
  }

  // Give nuxt middleware to express
  app.use(nuxt.render)

  // Listen the server
  app.listen(port, host, () => {
    consola.ready({
      message: `Server listening on http://${host}:${port}`,
      badge: true
    })
  })
}
start()

also in this folder there is a file app.js , which is included in index.js

const express = require('express')
const app = express()

module.exports = app

But when running node server/index.js it throws the following error

Answer 1

Immediately the answer is about export. Nowhere in the docks do they write about this nice feature.
The casket lies in the fact that some modules cannot be called from anywhere via export {}
Such modules are usually connected globally, like ~/plugins/ or ~/store/module
In the future, probably, instead of this error, they will finally write the following -
Module connection error. Use a global import or something like that)