apt-get update не работает внутри контейнера: репозиторий yarn не подписан

[JammyDodger]

Кстати, я думаю, что Babble не работает уже какое-то время:

Babble Chat

Please note that this plugin is no longer maintained and will likely cause problems in its current state: Babble is an simple, lightweight chat plugin for Discourse. It re-skins the existing topic view into a sidebar, allowing for quick conversations in your forum. Note the tag above - Babble has been tagged a “broken-plugin.” [48%20AM] Check out the demo site to see it in action, or view (and contribute to!) the code on Github. If you’d like to help translate Babble to your lan…