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What
Fix #9614
Additional info (optional)
docker/build-push-action#716 と moby/buildkit#1512 が原因でGHAではdownload cacheが効かないのでcache-fromとcache-toでレイヤを再利用できるようにしている。
ローカルではレイヤキャッシュは勝手に処理してくれるはずだし、なにか事前情報が変わったとしてもaptとpnpmのdownload cacheを再利用できるようにしている。
注意点として、BuildKitの機能を利用しているのでSUSE系のビルダーツール(Podman, Buildah)では動かないかもしれない。(kanikoは勝手に無視してくれたっぽい)