minimalistic node http proxy

	var http = require('http');
	var url = require('url');
	var path = require('path');
	var request = require('request');
	var ports = {
	"localhost": 3100,
	"dev.localhost": 3200
	}
	var proxyServer = http.createServer(proxy).listen(3000)
	function proxy(req, res) {
	var fromUrl = 'http://' + req.headers.host
	var hostname = url.parse(fromUrl).hostname
	var uri = 'http://' + hostname + ':' + ports[hostname]
	request(uri).pipe(res)
	}