Update README.md

Signed-off-by: oldjs <blender357@foxmail.com>

Author: oldjs

README.md

@@ -4,7 +4,7 @@
   <a href="https://github.com/oldjs/web-code-agent/network/members"><img src="https://img.shields.io/github/forks/oldjs/web-code-agent?style=social" alt="GitHub forks"></a>
   <a href="https://github.com/oldjs/web-code-agent/issues"><img src="https://img.shields.io/github/issues/oldjs/web-code-agent" alt="GitHub issues"></a>
 </p>
-
+[![Powered by DartNode](https://dartnode.com/branding/DN-Open-Source-sm.png)](https://dartnode.com "Powered by DartNode - Free VPS for Open Source")
 <p align="center">
   <a href="https://github.com/oldjs/web-code-agent/blob/main/preview.md">
     <img src="https://img.shields.io/badge/Preview-Click%20Here-blue" alt="Preview">