create placeholder api endpoint

src/app/api/guess/route.ts

@@ -0,0 +1,7 @@
+import { NextResponse } from "next/server";
+
+export async function POST(request: Request) {
+  const { input } = await request.json();
+  const correct = input === "test" || input === "test2";
+  return NextResponse.json({ input, name: input.toUpperCase(), correct, description: "title of person" });
+}