Update server.js

server.js

@@ -214,10 +214,11 @@ app.get(`${CITI_BASE}/accounts/:accountId/transactions`, (req, res) => {
 // Serve frontend files from the dist directory
 app.use(express.static(path.join(__dirname, 'dist')));
 
-// SPA Fallback: Redirect all non-API requests to index.html
-// In Express 5, wildcard parameters must be named. 
-// Using '/:path*' satisfies path-to-regexp v8 requirements for catch-all routing.
-app.get('/:path*', (req, res) => {
+// SPA Fallback: Catch any request that didn't match an API route or a static file.
+// In Express 5, using a middleware function without a path is the safest way 
+// to implement a catch-all fallback for Single Page Applications.
+app.use((req, res) => {
+  // Safeguard: Do not serve index.html for missing API routes
   if (req.path.startsWith('/api')) {
     return res.status(404).json({ error: 'API endpoint not found' });
   }