fix error

Author: SpencerAung

app.js

@@ -4,7 +4,7 @@ var app = express();
 
 var port = process.env.PORT || 3000;
 
-app.use('/assets/', app.static(__dirname + '/public'));
+app.use('/assets/', express.static(__dirname + '/public'));
 
 app.set('view engine', 'ejs');