node start
npm start
npm install
cnpm install
npm install grunt --save-dev
cnpm install grunt --save-dev
cnpm install grunt-contrib-uglify --save-dev
npm install -g cnpm --registry=https://registry.npm.taobao.org   //淘宝镜像
npm uninstall grunt-contrib-imagemin
npm install grunt-contrib-imagemin
cnpm uninstall jpegtran-bin@3.1.0