npm有的包需要访问github导致安装失败的解决办法

项目下新建.npmrc文件

加入以下配置,注意node-sass，phantomjs，electron只是加载慢的示例包

registry=https://registry.npmmirror.com
sass_binary_site=https://registry.npmmirror.com/node-sass
phantomjs_cdnurl=https://registry.npmmirror.com/phantomjs
#electron_mirror=https://registry.npmmirror.com/electron