Merge pull request #7 from ryuujo1573/doc

✈️ Accomplish readme

README.md

@@ -1,2 +1,31 @@
-# untitled-whiteboard
+<h1 align="center">untitled-whiteboard</h1>
+
 An untitled whiteboard app runs on Web.
+
+## 运行
+
+如果没有安装 `pnpm`，请先安装 `pnpm` 
+
+```shell
+npm i -g pnpm
+```
+
+安装依赖
+
+```shell
+pnpm i
+```
+
+运行 development 环境
+
+```shell
+pnpm dev
+```
+
+## 架构设计文档
+
+[架构设计文档 · ryuujo1573/untitled-whiteboard Wiki (github.com)](https://github.com/ryuujo1573/untitled-whiteboard/wiki/%E6%9E%B6%E6%9E%84%E8%AE%BE%E8%AE%A1%E6%96%87%E6%A1%A3)
+
+## 演示视频
+
+[stem cell队｜七牛云1024创作节参赛作品_哔哩哔哩_bilibili](https://www.bilibili.com/video/BV1Nd4y1k7WL)