Secure Container Image Builds with GitHub Actions
A minimal GitHub Actions approach to reproducible builds, provenance, and vulnerability checks for container images.
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GitHub Actions can produce trustworthy images when the pipeline is explicit about provenance.
Baseline workflow #
- Build with pinned actions and deterministic build arguments.
- Generate an SBOM for every pushed image digest.
- Run vulnerability scanning as a required check.
- Sign images using keyless OIDC signing.
Team-level win #
Once this pattern is in place, deployment approvals can focus on actual risk instead of guessing whether an image is trustworthy.