It works?

api/search.js

@@ -7,18 +7,15 @@ const parseMarkdown = require('../scripts/parseMarkdown');
 // const index = JSON.parse(fs.readFileSync(indexPath, 'utf-8'));
 
 module.exports = async (req, res) => {
+  let index;
   try {
-    const index = require('build/indices/index.json');
+    index = require('build/indices/index.json');
     res.json({ success: true });
   } catch (error) {
     const files = fs.readdirSync('.');
     res.json({ error, files });
   }
 
-  return;
-
-
-
   const search = req.query.query;
   if (!query) {
     res.status(400);