Add medium article link

docs/react/customize-theme.en-US.md

@@ -57,3 +57,7 @@ Create a standalone less file like the one below, and import it in your project.
    ```
 
 Note: This way will load the styles of all components, regardless of your demand, which cause `style` option of `babel-plugin-import` not working.
+
+## Related Articles
+
+- [How to Customize Ant Design with React & Webpack… the Missing Guide](https://medium.com/@GeoffMiller/how-to-customize-ant-design-with-react-webpack-the-missing-guide-c6430f2db10f)

docs/react/customize-theme.zh-CN.md

@@ -60,3 +60,7 @@ antd 的样式使用了 [Less](http://lesscss.org/) 作为开发语言，并定
    ```
 
 注意：这种方式会载入所有组件的样式，无法和按需加载插件 `babel-plugin-import` 的 `style` 属性一起使用。
+
+## 社区教程
+
+- [How to Customize Ant Design with React & Webpack… the Missing Guide](https://medium.com/@GeoffMiller/how-to-customize-ant-design-with-react-webpack-the-missing-guide-c6430f2db10f)