第一版提交，答题功能OK，题库管理待完善

api/index.ts

@@ -0,0 +1,9 @@
+/**
+ * Vercel deploy entry handler, for serverless deployment, please don't modify this file
+ */
+// import type { VercelRequest, VercelResponse } from '@vercel/node';
+import app from './app.js';
+
+export default function handler(req: any, res: any) {
+  return app(req, res);
+}