Add Web UI microservice route path to handle rulenodes help assets

@@ -83,6 +83,10 @@ var server;
               apiProxy.web(req, res);
             });
 
+            app.all('/assets/help/*/rulenode/*', (req, res) => {
+                apiProxy.web(req, res);
+            });
+
             server.on('upgrade', (req, socket, head) => {
               apiProxy.ws(req, socket, head);
             });