clean up messy code

src/backend/web/routes/index.js

@@ -1,12 +1,13 @@
 const express = require('express');
 const path = require('path');
+const admin = require('./admin');
 
 const router = express.Router();
 
 router.get('/', (req, res) => {
   res.sendFile(path.join(__dirname, '../../../frontend/index.html'));
 });
 
-router.use('/admin', require('./admin'));
+router.use('/admin', admin);
 
 module.exports = router;