fix(backend): add auth middleware to walkthrough routes

backend/src/routes/walkthrough.routes.ts

@@ -10,6 +10,15 @@ import {
 } from '../controllers/walkthrough.controller';
 
 export async function walkthroughRoutes(server: FastifyInstance) {
+    // Auth middleware
+    server.addHook('onRequest', async (request) => {
+        try {
+            await request.jwtVerify();
+        } catch (err) {
+            throw err;
+        }
+    });
+
     // Walkthrough CRUD
     server.post('/', createWalkthrough);
     server.get('/', getWalkthroughs);