./discourse-setup:无法解析主机:github.com

我在基于 Ubuntu 20.04 的默认 DigitalOcean Droplet 上也遇到了同样的问题。你找到解决方案了吗?

现在似乎可以正常工作了,详见 After upgrade, docker cannot communicate with the outside world - #24 by niels-anders