chore: initial import for test contour with k3s CI

assets/controllers/scrollTop_controller.js

@@ -0,0 +1,28 @@
+import { Controller } from 'stimulus';
+
+/*
+ * This is an example Stimulus controller!
+ *
+ * Any element with a data-controller="default" attribute will cause
+ * this controller to be executed. The name "default" comes from the filename:
+ * default_controller.js -> "default"
+ *
+ * Delete this file or adapt it for your use!
+ */
+export default class extends Controller {
+    connect() {
+        var btn = this.element;
+
+        $(window).scroll(function() {     
+            if ($(window).scrollTop() > 300) {
+                btn.classList.remove('d-none')
+            } else {
+                btn.classList.add('d-none')
+            }
+        });
+
+        btn.addEventListener('click', function(e) {
+            $('html, body').animate({scrollTop:0}, '300');
+        });
+    }
+}