./discourse-setup: не удалось разрешить имя хоста: github.com

[supermathie (Michael Brown)]

Это уже как минимум второй подобный случай за последние дни.

After upgrade, docker cannot communicate with the outside world

Honestly, I think the best approach at this point is to reinstall and copy your data over. You have a broken system for Mysterious Reasons, and the installation process is rather quick. It’s likely the best use of your time.

Мы изучим этот вопрос.