Proxy all requests to another server, add Access-Control headers

proxy-server.js

var http = require('http'),
  httpProxy = require('http-proxy');

var proxy = httpProxy.createProxyServer({});

var server = http.createServer(function (req, res) {
  console.log(req.url, req.method);

  res.setHeader('Access-Control-Allow-Origin', '*');
  res.setHeader('Access-Control-Request-Method', '*');
  res.setHeader('Access-Control-Allow-Methods', 'OPTIONS, GET, POST, PUT, DELETE');
  res.setHeader('Access-Control-Allow-Headers', 'Content-Type, Authorization');
  if (req.method === 'OPTIONS') {
    res.writeHead(200);
    res.end();
    return;
  }

  proxy.web(req, res, { target: 'https://api.something.com' });
});

server.listen(8000);