直接在当前目录下进行node-sass 的数据源没设置：
npm config set sass_binary_site=https://npm.taobao.org/mirrors/node-sass
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! node-sass@4.14.0 postinstall: `node scripts/build.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the node-sass@4.14.0 postinstall script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
报错截图：
再次执行：
npm install
