refactor: added port setting into express

Author: manchuck

voice/connect-an-inbound-call.js

@@ -1,12 +1,13 @@
 require('dotenv').config({ path: __dirname + '/../.env' });
+
+const VONAGE_NUMBER = process.env.VONAGE_NUMBER;
+const VONAGE_VIRTUAL_NUMBER = process.env.VONAGE_VIRTUAL_NUMBER;
+
 const Express = require('express');
 
 const app = new Express();
 const port = process.env.PORT || 3000;
 
-const VONAGE_NUMBER = process.env.VONAGE_NUMBER;
-const VONAGE_VIRTUAL_NUMBER = process.env.VONAGE_VIRTUAL_NUMBER;
-
 const onInboundCall = (_, response) => {
   const ncco = [
     {

voice/handle-user-input-dtmf.js

@@ -1,7 +1,10 @@
+require('dotenv').config({ path: __dirname + '/../.env' });
 const Express = require('express');
 const bodyParser = require('body-parser');
 
 const app = new Express();
+const port = process.env.PORT || 3000;
+
 app.use(bodyParser.json());
 
 const onInboundCall = (request, response) => {
@@ -37,4 +40,6 @@ app
   .get('/webhooks/answer', onInboundCall)
   .post('/webhooks/dtmf', onInput);
 
-app.listen(3000);
+app.listen(port, () => {
+  console.log(`Example app listening on port ${port}`);
+});

voice/receive-an-inbound-call.js

@@ -1,5 +1,7 @@
 const Express = require('express');
+
 const app = new Express();
+const port = process.env.PORT || 3000;
 
 const onInboundCall = (request, response) => {
   const from = request.query.from;
@@ -17,4 +19,6 @@ const onInboundCall = (request, response) => {
 
 app.get('/webhooks/answer', onInboundCall);
 
-app.listen(3000);
+app.listen(port, () => {
+  console.log(`Example app listening on port ${port}`);
+});