allow running, testing and scoring of files in subfolders by using the full filepath

app/assets/javascripts/editor/execution.js.erb

@@ -2,8 +2,9 @@ CodeOceanEditorWebsocket = {
   websocket: null,
 
   createSocketUrl: function(url) {
-      var sockURL = new URL(window.location);
-      sockURL.pathname = url;
+      var sockURL = new URL(url, window.location);
+      // not needed any longer, we put it directly into the url: sockURL.pathname = url;
+
       // sanitize socket protocol string, strip trailing slash and other malicious chars if they are there
       sockURL.protocol = '<%= DockerClient.config['ws_client_protocol']&.match(/(\w+):*\/*/)&.to_a&.at(1) %>:';