컨테이너에서 apt-get update 실패: yarn 저장소 서명 안 됨

[JammyDodger]

참고로, babble은 꽤 오랫동안 깨져 있는 것 같습니다:

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Please note that this plugin is no longer maintained and will likely cause problems in its current state: Babble is an simple, lightweight chat plugin for Discourse.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…