server.js

const express = require('express');
const path = require('path');

const app = express();

// Serve the static files from the React app
app.use(express.static(path.join(__dirname, '/build')));

// Handles any requests that don't match the ones above
app.get('*', (req,res) =>{
    res.sendFile(path.join(__dirname+'/build/index.html'));
});



var server = app.listen(process.env.PORT || 3000, listen);

// This call back just tells us that the server has started
function listen() {
    var host = server.address().address;
    var port = server.address().port;
    console.log('React app live at http://' + host + ':' + port);
    console.log('If you want to run a developemnt server instead use:  `npm run dev` or `yarn dev` ');
}