hook.io example microservice for saying hello world to a request

helloWorld.js

// A simple hello world microservice 
// Click "Deploy Service" to deploy this code
// Service will respond to HTTP requests with a string
module['exports'] = function helloWorld (hook) {
  // hook.req is a Node.js http.IncomingMessage
  var host = hook.req.host;
  // hook.res is a Node.js httpServer.ServerResponse
  // Respond to the request with a simple string
  hook.res.end(host + ' says, "Hello world!"');
};