node官网 下载LTS版本安装程序包，运行程序包完成安装。
node安装成功后，查看版本命令：npm -v
为什么需要yarn，详见 yarn官网。
npm install yarn -g
如果出现如下报错：
npm ERR! code ETIMEDOUT
npm ERR! errno ETIMEDOUT
npm ERR! network request to https://registry.npmjs.org/yarn failed, reason: connect ETIMEDOUT 104.16.16.35:443
npm ERR! network This is a problem related to network connectivity.
npm ERR! network In most cases you are behind a proxy or have bad network settings.
npm ERR! network
npm ERR! network If you are behind a proxy, please make sure that the
npm ERR! network 'proxy' config is set properly. See: 'npm help config'
则可通过改用淘宝镜像来解决：
npm install -g yarn --registry=https://registry.npm.taobao.org
安装完成后一并调整镜像仓库配置
yarn config set registry https://registry.npm.taobao.org -g
yarn安装成功后，查看版本命令：yarn -v
参考 vuepress官方教程安装vuepress。
# 安装
yarn add -D vuepress # npm install -D vuepress
yarn add -D vuepress-plugin-auto-sidebar
# 运行
yarn docs:dev # 或者 npm run docs:dev
# 发布： 发布前请配置发布仓库地址，详见deploy.sh
yarn deploy # 或者 npm run deploy