feat: 📝 更新说明文档

Author: fxss5201

README.md

@@ -7,7 +7,7 @@ In the project directory, you can run:
 ### `yarn start`
 
 Runs the app in the development mode.<br />
-Open [http://localhost:3000](http://localhost:3000) to view it in the browser.
+Open [http://localhost:8000](http://localhost:8000) to view it in the browser.
 
 The page will reload if you make edits.<br />
 You will also see any lint errors in the console.