Simple Express Server to serve a react app located in client dir

index.js

const express = require('express');


const app = express();

  // serve up production assets
  app.use(express.static('client/build'));
  // serve up the index.html if express does'nt recognize the route
  const path = require('path');
  app.get('*', (req, res) => {
      res.sendFile(path.resolve(__dirname, 'client', 'build', 'index.html'));
  });

// if not in production use the port 5000
const PORT = process.env.PORT || 5000;
console.log('server started on port:',PORT);
app.listen(PORT);