chore: tidy up unnecessary imports and conventions, use more relevant and readable express methods

Author: stern-shawn

rest/messages/generate-twiml-sms/generate-twiml-sms.3.x.js

@@ -1,6 +1,5 @@
-const http = require('http');
 const express = require('express');
-const MessagingResponse = require('twilio').twiml.MessagingResponse;
+const { MessagingResponse } = require('twilio').twiml;
 
 const app = express();
 
@@ -9,10 +8,9 @@ app.post('/sms', (req, res) => {
 
   twiml.message('The Robots are coming! Head for the hills!');
 
-  res.writeHead(200, {'Content-Type': 'text/xml'});
-  res.end(twiml.toString());
+  res.type('text/xml').send(twiml.toString());
 });
 
-http.createServer(app).listen(1337, () => {
-  console.log('Express server listening on port 1337');
+app.listen(3000, () => {
+  console.log('Express server listening on port 3000');
 });