docs: add credits section to README (#8)

Author: chenjiahan

README.md

@@ -760,6 +760,12 @@ app.use(devMiddleware.honoWrapper(compiler, devMiddlewareOptions));
 serve(app);
 ```
 
+## Credits
+
+This repository is forked from [webpack-dev-middleware](https://github.com/webpack/webpack-dev-middleware). It adapts the original implementation for the Rspack ecosystem, bridging behavioral differences with webpack while adding Rspack-specific capabilities.
+
+> Thanks to the webpack-dev-middleware maintainers and its original creator, [@sokra](https://github.com/sokra).
+
 ## Contributing
 
 Please take a moment to read our contributing guidelines if you haven't yet done so.