구름IDE heroku 공개키 서명 인증 오류

구름IDE(goormIDE)의 문제라기보다는 컨테이너의 프로비저닝 이미지 생성 시점에 설치된 heroku의 공개키 서명 문제이다.
무시해도 그만이지만 업데이트 할 때마다 보이는 게 거슬려 heroku를 재설치 하면 문제가 해결된다.

System:

# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 18.04.5 LTS
Release:        18.04
Codename:       bionic

Action: apt update

Error message:

Err:4 https://cli-assets.heroku.com/apt ./ InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5DC22404A6F9F1CA

W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://cli-assets.heroku.com/apt ./ InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5DC22404A6F9F1CA
W: Failed to fetch https://cli-assets.heroku.com/apt/./InRelease  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5DC22404A6F9F1CA
W: Some index files failed to download. They have been ignored, or old ones used instead.

Fix it:

curl https://cli-assets.heroku.com/install-ubuntu.sh | sh