Lägg till autentisering och loggning, refaktorisera uppgifter till router

middleware/auth.js

@@ -0,0 +1,16 @@
+const basicAuth = require('basic-auth');
+
+const auth = (req, res, next) => {
+    const user = basicAuth(req);
+    const username = process.env.AUTH_USERNAME; // Use environment variables
+    const password = process.env.AUTH_PASSWORD; // Use environment variables
+
+    if (user && user.name === username && user.pass === password) {
+        return next();
+    } else {
+        res.set('WWW-Authenticate', 'Basic realm="401"');
+        return res.status(401).send('Authentication required.');
+    }
+};
+
+module.exports = auth;