Moved the NodeJS version of the application to the app/ directory.

app/frontend/tsconfig.json

@@ -0,0 +1,15 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "lib": ["ES2022", "DOM", "DOM.Iterable"],
+    "module": "ESNext",
+    "moduleResolution": "Bundler",
+    "jsx": "react-jsx",
+    "strict": true,
+    "skipLibCheck": true,
+    "noEmit": true,
+    "resolveJsonModule": true,
+    "types": ["vite/client", "vitest/globals"]
+  },
+  "include": ["src", "test", "vite.config.ts"]
+}