server.js

import express from "express"
import path from "path"
import httpProxy from "http-proxy"
import "./osc_server"

var proxy = httpProxy.createProxyServer();
var app = express();

var isProduction = process.env.NODE_ENV === 'production';
var port = isProduction ? process.env.PORT : 3000;
var publicPath = path.resolve(__dirname, 'public');

// We point to our static assets
app.use(express.static(publicPath));

// We only want to run the workflow when not in production
if (!isProduction) {
    // We require the bundler inside the if block because
    // it is only needed in a development environment. Later
    // you will see why this is a good idea
    var bundle = require('./server/bundle.js');
    bundle();
    
    // Any requests to localhost:3000/build is proxied
    // to webpack-dev-server
    app.all('/build/*', function (req, res) {
        proxy.web(req, res, {
            target: 'http://localhost:8080'
        });
    });
}

// It is important to catch any errors from the proxy or the
// // server will crash. An example of this is connecting to the
// // server when webpack is bundling
proxy.on('error', function(e) {
    console.log('Could not connect to proxy, please try again...');
});

// And run the server
app.listen(port, function () {
    console.log('Server running on port ' + port);
});