made a change

Author: Mehulcoder

app.js

@@ -60,6 +60,7 @@ app.use(commentRoutes);
 app.use(campgroundRoutes);
 app.use(authRoutes);
 
-app.listen(3000, function () {  
-    console.log("Project works fine");
-});
+app.listen(3000 || process.env.PORT, () => {
+    console.log('YelpCamp server has started!!');
+});
+    

package.json

@@ -5,7 +5,7 @@
   "main": "app.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
-    "start": "app.js"
+    "start": "node app.js"
   },
   "repository": {
     "type": "git",