send files with requests instead of serving the whole repertory in static

src/routes/root.js

@@ -6,4 +6,12 @@ router
   .route("/")
   .get(mainController.root);
 
+router
+  .route("/style.css")
+  .get(mainController.style);
+
+router
+  .route("/script.js")
+  .get(mainController.script);
+
 module.exports = router;