何も変更してないのにdocker buildでエラーになる？

エラー概要

Dockerfileを変更していないのに、
apt updateでAt least one invalid signature was encounteredのエラーが発生するようになった。

 > [4/7] RUN apt update && apt install -y $(cat packages.txt):                                         
0.127 
0.127 WARNING: apt does not have a stable CLI interface. Use with caution in scripts.
0.127 
0.193 Get:1 http://deb.debian.org/debian bookworm InRelease [151 kB]
0.219 Get:2 http://deb.debian.org/debian bookworm-updates InRelease [55.4 kB]
0.231 Get:3 http://deb.debian.org/debian-security bookworm-security InRelease [48.0 kB]
0.234 Err:1 http://deb.debian.org/debian bookworm InRelease
0.234   At least one invalid signature was encountered.
0.249 Err:2 http://deb.debian.org/debian bookworm-updates InRelease
0.249   At least one invalid signature was encountered.
0.263 Err:3 http://deb.debian.org/debian-security bookworm-security InRelease
0.263   At least one invalid signature was encountered.

原因

何度もdocker buildをデバックしていたため、ディスクがフルになっていた模様。

> df -h
Filesystem        Size    Used   Avail Capacity iused ifree %iused  Mounted on
...
/System/Volumes/Data
map auto_home      0Bi     0Bi     0Bi   100%       0     0     -
...

解決策

不要なコンテナやイメージ、キャッシュなどを削除。

> docker system prune -a
WARNING! This will remove:
  - all stopped containers
  - all networks not used by at least one container
  - all images without at least one container associated to them
  - all build cache

Are you sure you want to continue? [y/N] y
Deleted Containers:
...

Deleted Images:
....

Total reclaimed space: 55.14GB

これで解決しました🎉