server.js

const port = 3000;
const distPath = 'www';

// express server
const { join } = require('path');
const express = require('express');
const app = express();
app
  .use(express.static(distPath))
  .get(/^[^.]*$/, (req, rep) => rep.sendFile(join(__dirname, distPath, '/index.html')))
  .listen(port);