refactor: remove some duplicated code

routes/api/index.ts

@@ -1,11 +1,10 @@
-import { HandlerContext } from "$fresh/server.ts";
+import { Handlers } from "$fresh/server.ts";
 import { getDocuments } from "@lib/documents.ts";
+import { json } from "@lib/helpers.ts";
 
-export const handler = async (
-  _req: Request,
-  _ctx: HandlerContext,
-): Promise<Response> => {
-  const documents = await getDocuments();
-  const response = new Response(JSON.stringify(documents));
-  return response;
+export const handler: Handlers = {
+  async GET() {
+    const documents = await getDocuments();
+    return json(documents);
+  },
 };