update

Author: zhiyuanliang-ms

articles/azure-app-configuration/howto-targetingfilter-javascript.md

@@ -132,11 +132,12 @@ In the web application, the targeting context can also be provided as an ambient
 
 We will use ambient targeting context as an example in this tutorial.
 
-1. Add the following code after where you declare the express server.
+1. Add the following code after the express server declaration
 
     ```js
     const express = require("express");
     const server = express();
+    const port = 8080
 
     const { AsyncLocalStorage } = require("async_hooks");
     const requestAccessor = new AsyncLocalStorage();