Update README.md to improving the reading experience.

Author: wi1dcard

README.md

@@ -5,7 +5,9 @@
 
 ## 如何阅读
 
-你可以在 [![](https://img.shields.io/badge/Available%20on-Laravel--China-brightgreen.svg)](https://learnku.com/blog/wi1dcard) 查看我的博客，亦可 [![](https://img.shields.io/badge/Available%20on-GitHub-brightgreen.svg)](https://github.com/wi1dcard/laravel-deployment/tree/master/src) 阅读源代码。
+可查看 [我的博客](https://learnku.com/blog/wi1dcard)，亦可阅读 [源代码](https://github.com/wi1dcard/laravel-deployment/tree/master/src)，配合 [Octotree](https://github.com/ovity/octotree) 插件能够显示目录，获得较好的阅读体验：
+
+![](https://github.com/wi1dcard/laravel-deployment/raw/master/src/images/1a8dc8c46498f35e52a46553ed1ea342.png)
 
 ## 简介