✨feature: Add success message display for site creation

routes/index.js

@@ -7,7 +7,7 @@ const sitesModel = new SiteModel();
 router.get('/', async function(req, res, next) {
   const sites = await sitesModel.getAll();
   // console.log('Sites:', sites);
-  res.render('index', { title: 'Playwright Testing Dashboard', sites: sites });
+  res.render('index', { title: 'Playwright Testing Dashboard', sites: sites, msg: '' });
 });
 
 module.exports = router;