This may be an upstream problem, but FYI, I can't get my hadolint action to work anymore:
Step 1/4 : FROM ghcr.io/hadolint/hadolint:v2.12.0-debian
Head "https://ghcr.io/v2/hadolint/hadolint/manifests/v2.12.0-debian": received unexpected HTTP status: 503 Service Unavailable

This may be an upstream problem, but FYI, I can't get my hadolint action to work anymore: