大哥
HEX_MIRROR=https://o70o6u4j7.qnssl.com mix deps.get
无效，应该怎么处理呢？谢谢！报错为：
** (Mix) Could not verify authenticity of fetched registry file. This may happen because a proxy or some entity is interfering with the download or because you don't have a public key to verify the registry.
You may try again later or check if a new public key has been released in our public keys page: https://hex.pm/docs/public_keys
解决中国安装 hex 包不稳定的办法2016-10-20 更新：⚠️ UPYUN 官方给了一个镜像，推荐使用这个：https://ruby-china.org/topics/31631 因为 Hex 默认使用...