安装全局 npm install -g electron 需要正确设置 ELECTRON_MIRROR ，加速下载 electron 预编译文件

npm config set ...

registry=https://registry.npm.taobao.org
sass_binary_site=https://npm.taobao.org/mirrors/node-sass/
ELECTRON_MIRROR=https://npm.taobao.org/mirrors/electron/

npm install -g electron