Added site index file and created_at

backend/app/handlers/site.go

@@ -110,6 +110,9 @@ func validateIncomingSite(site *models.Site) error {
 	if site.NotFoundFile == "" {
 		site.NotFoundFile = "404.html"
 	}
+	if site.IndexFile == "" {
+		site.IndexFile = "index.html"
+	}
 	if site.ForwardRules == nil {
 		site.ForwardRules = []models.ForwardRule{}
 	}