docs: update getting-started guide

Author: meteorlxy

packages/docs/docs/guide/getting-started.md

@@ -63,7 +63,7 @@ yarn docs:dev # OR npm run docs:dev
 To generate static assets, run:
 
 ``` bash
-yarn docs:build # Or npm run docs:build
+yarn docs:build # OR npm run docs:build
 ```
 
 By default, the built files will be in `.vuepress/dist`, which can be configured via the `dest` field in `.vuepress/config.js`. The built files can be deployed to any static file server. See [Deployment Guide](deploy.md) for guides on deploying to popular services.

packages/docs/docs/zh/guide/getting-started.md

@@ -12,6 +12,9 @@
 # 安装
 yarn global add vuepress # 或者：npm install -g vuepress
 
+# 创建项目目录
+mkdir vuepress-starter && cd vuepress-starter
+
 # 新建一个 markdown 文件
 echo '# Hello VuePress!' > README.md