attempted upgrade

vite.config.ts

@@ -6,16 +6,14 @@ import react from '@vitejs/plugin-react';
 export default defineConfig({
   server: {
     port: 3000,
+    allowedHosts: ["dev.flexxon.app"]
   },
   plugins: [
     tsConfigPaths({
       projects: ['./tsconfig.json'],
     }),
     tanstackStart({
-      customViteReactPlugin: true,
-      tsr: {
-        srcDirectory: 'src/app',
-      },
+      srcDirectory: 'src/app',
     }),
     react()
   ]