const next = require('next') const express = require('express') const getPort = require('get-port') async function main() { const dev = process.env.NEXT_TEST_MODE === 'dev' process.env.NODE_ENV = dev ? 'development' : 'production' const port = await getPort() const app = next({ dev }) const handleNextRequest = app.getRequestHandler() await app.prepare() const server = express() server.all('/:path', (req, res) => { handleNextRequest(req, res) }) server.listen(port, (err) => { if (err) { throw err } console.log(`- Local: http://localhost:${port}`) console.log(`- Next mode: ${dev ? 'development' : process.env.NODE_ENV}`) }) } main().catch((err) => { console.error(err) process.exit(1) })