Integrate React frontend with backend API

sample-front-end/vite.config.ts

@@ -18,6 +18,11 @@ export default defineConfig(({ mode }) => {
         alias: {
           '@': path.resolve(__dirname, '.'),
         }
+      },
+      base: '/',
+      build: {
+        outDir: path.resolve(__dirname, '../app/static/frontend'),
+        emptyOutDir: true,
       }
     };
 });