- https://docs.github.com/en/actions/deployment/security-hardening-your-deployments/about-security-hardening-with-openid-connect
- https://blog.chainguard.dev/zero-friction-keyless-signing-with-github-actions/
- https://blog.chainguard.dev/keyless-signing-with-tekton-on-amazon-eks-2/
- https://github.blog/2021-12-06-safeguard-container-signing-capability-actions/