Update README.md

Author: magefan

README.md

@@ -36,6 +36,53 @@ globalSrc += "\n" + src;
 console.log(globalSrc);
 
 ```
+## Demo
+
+Try out our open demo and if you like our extension **please give us some star on Github ★**
+<table>
+  <tbody>
+    <tr>
+      <td align="center" valign="middle">
+        Storefront Demo
+      </td>
+      <td align="center" valign="middle">
+        Admin Panel Demo
+      </td align="center" valign="middle">
+    </tr>
+    <tr>
+      <td align="center" valign="middle">
+        <a href="https://opt.demo.magefan.top/">
+          <img
+            src="https://magefan.com/static/version1520969775/frontend/Magefan/new/en_US/images/product-tab-demo-1.jpg"
+            alt="Magneto 2 Rocket JavaScript Extension Storefront Demo"
+            height="220"
+          >
+        </a>
+      </td>
+      <td align="center" valign="middle">
+        <a href="https://opt.demo.magefan.top/admin/admin/">
+          <img
+            src="https://magefan.com/static/version1520969775/frontend/Magefan/new/en_US/images/product-tab-demo-2.jpg"
+            alt="Magneto 2 Rocket JavaScript Extension Admin Panel Demo"
+            height="220"
+          >
+        </a>
+      </td>
+    </tr>
+    <tr>
+      <td align="center" valign="middle">
+        <a href="https://opt.demo.magefan.top/">
+          view
+        </a>
+      </td>
+      <td align="center" valign="middle">
+        <a href="https://opt.demo.magefan.top/admin/admin/">
+          view
+        </a>
+      </td>
+    </tr>
+  </tbody>
+</table>
 
 ## Support
 If you have any issues, please [contact us](mailto:support@magefan.com)