node.js proxy to salesforce REST

app.js

var fs = require('fs');
var bouncy = require('bouncy');

// load up your instance and port into environment variables
var instance = (process.env.instance) ? process.instance.env : 'na1';
var port = (process.env.port) ? process.env.port : 443;

// self-signed certificate created with openssl
var opts = {
    key : fs.readFileSync(__dirname + '/key.pem'),
    cert : fs.readFileSync(__dirname + '/certificate.pem')
};

// proxy api requests to the salesforce endpoint
bouncy(opts, function (req, bounce) {
    bounce(instance + '.salesforce.com');
}).listen(port);