Implement server-side authentication and update login UI texts

routes/auth.js

@@ -0,0 +1,17 @@
+const express = require('express');
+const basicAuth = require('basic-auth');
+const router = express.Router();
+
+router.post('/login', (req, res) => {
+    const user = basicAuth(req);
+    const username = process.env.AUTH_USERNAME;
+    const password = process.env.AUTH_PASSWORD;
+
+    if (user && user.name === username && user.pass === password) {
+        res.status(200).send('Login successful');
+    } else {
+        res.status(401).send('Authentication required');
+    }
+});
+
+module.exports = router;