Added web server

comments.js

@@ -0,0 +1,24 @@
+// Create web server and listen to port 3000
+const express = require('express');
+const app = express();
+const bodyParser = require('body-parser');
+const fs = require('fs');
+
+app.use(bodyParser.json());
+
+// Read comments from file
+const comments = JSON.parse(fs.readFileSync('comments.json'));
+
+app.get('/comments', (req, res) => {
+    res.json(comments);
+});
+
+app.post('/comments', (req, res) => {
+    comments.push(req.body);
+    fs.writeFileSync('comments.json', JSON.stringify(comments, null, 2));
+    res.status(201).json(req.body);
+});
+
+app.listen(3000, () => {
+    console.log('Server is listening on port 3000');
+});