Bundling express.js and next.js app throwing Error: Cannot find module next.config.js' - express

Question

I have setup a express.js + next.js app, which is running fine in development environment. When I am trying to run its webpack bundle, Its throwing error
Error: Cannot find module '/Users/user/workspace/project/next.config.js'
I am trying to run its bundle as aws-lamda is not allowing me to upload zip size more than 50MB.
// server.js
const express = require('express');
const argv = require('yargs').argv;
const nextApp = require('./nextApp.js');
const handle = nextApp.getRequestHandler();
const pageRoutes = require('./routes/pages/index.js');
const port = argv.port || 3000;
const server = express();
// route to next.js web pages
server.use('/', pageRoutes);
server.get('*', (req, res) => {
return handle(req, res)
});
nextApp.prepare()
.then(() => {
server.listen(port, (err) => {
if (err) throw err
console.log(`> Ready on http://localhost:${port}`)
});
})
.catch((ex) => {
console.error(ex.stack)
process.exit(1)
});
module.exports = server;

Answer 1

So far I have found that we can/should extends next.config.js for adding additional bundle entries instead of creating a separate webpack.config.js. Following config will create a serverbundle.js file in build/server directory.
const merge = require('webpack-merge');
module.exports = {
distDir: 'build',
webpack (config, {isServer}) {
if (isServer) {
return merge(config, {
entry () {
return config.entry().then((entry) => {
return Object.assign({}, entry, { serverbundle: './server' })
})
},
output: {
filename: '[name].js'
}
});
}
return config;
}
}