Update README.md

Author: mamadcloud

examples/README.md

@@ -2,7 +2,7 @@
     <a href="https://nodejs.org">
         <img
             alt="NodeJS"
-            src="https://nodejs.org/static/images/logo.svg"
+            src="https://en.wikipedia.org/wiki/Node.js#/media/File:Node.js_logo.svg"
             width="150"
             style="background-color:black;padding:15px;border-radius:5px">
     </a>
@@ -75,4 +75,4 @@ To test `/api/callback` & `/api/webhook` to be called from our server, make sure
 
 We recommend to use [ngrok](https://ngrok.com/) if you want to run locally for debugging. Then You can replace `DOMAIN_URL` with generated URL by `ngrok`. 
 
-`NB: Use it at your own risk. Make sure do not expose your critical port.`
+`NB: Use it at your own risk. Make sure do not expose your critical port.`