问题：
- 使用yarn安装依赖时，卡在Building fresh packages...不动
解决：
- 在项目根目录新建.yarnrc文件,复制以下内容
registry "https://registry.npm.taobao.org"
sass_binary_site "https://npm.taobao.org/mirrors/node-sass/"
phantomjs_cdnurl "http://cnpmjs.org/downloads"
electron_mirror "https://repo.huaweicloud.com/electron/"
sqlite3_binary_host_mirror "https://foxgis.oss-cn-shanghai.aliyuncs.com/"
profiler_binary_host_mirror "https://npm.taobao.org/mirrors/node-inspector/"
chromedriver_cdnurl "https://cdn.npm.taobao.org/dist/chromedriver"
- 再次yarn安装依赖 成功
