update README

Author: akira-cn

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2022 稀土掘金
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -1,3 +1,10 @@
 # Showcase
 
-通过命令行快速加载 Vue、React 组件。
+通过命令行快速加载 Vue、React、SpriteJS 组件。
+
+## 特性
+
+- 提供命令行快速加载Vue、React和SpriteJS组件运行于浏览器端，不需要安装额外的编译环境和依赖。
+- 基于[Puppeteer](https://github.com/puppeteer/puppeteer)提供自动渲染能力，输出图片。
+- 提供灵活的命令行repl接口进行事件交互。
+- 灵活的设计，可以方便地扩展其他组件。