diff --git a/app.js b/app.js
index d869c65..f355e33 100644
--- a/app.js
+++ b/app.js
@@ -7,6 +7,7 @@ const helper=require('./helper')
 const index = require('./routes/index');
 const app = express();
 
+// middleware
 app.use(logger('dev'));
 app.use(cors())
 app.use(bodyParser.json());