Edit middleware example to include more

Author: mabelleeyanhwa

middleware_example.js

@@ -1,5 +1,6 @@
 const express = require("express");
 const app = express();
+const PORT = 3000;
 
 app.use(function(req, res, next) {
   console.log("common middleware function was called!");
@@ -11,14 +12,26 @@ app.use("/users", function(req, res, next) {
   next();
 });
 
+app.post("/users", function(req, res, next) {
+  console.log("second middleware function for /users was called!");
+  next();
+});
+
+app.get("/users", function(req, res, next) {
+  console.log("third middleware function for /users was called!");
+  next();
+});
+
 app.get("/users", function(req, res) {
+  console.log("users list was shown");
   res.send("Here is a list of users:....");
 });
 
 app.get("/books", function(req, res) {
+  console.log("books list was shown");
   res.send("Here is a list of books:....");
 });
 
-const server = app.listen(3000, function() {
-  console.log("Application started....");
+const server = app.listen(PORT, () => {
+  console.log(`Server running at http://localhost:${PORT}`);
 });