feat: digest-pin Node 22, harden compose, attest provenance + SBOM#20
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feat: digest-pin Node 22, harden compose, attest provenance + SBOM#20
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…SBOM
- Dockerfile: bump from node:20-alpine (EOL) to node:22-alpine pinned to
sha256:cb15fca92530… Dependabot's docker ecosystem will refresh this.
- docker-compose.yml: enable read_only rootfs, /tmp tmpfs, cap_drop ALL,
no-new-privileges:true. These are starter defaults — comments explain
how to relax them per-workload.
- cd.yml:
- Build job emits provenance + SBOM (build-push-action native flags)
plus an explicit anchore/sbom-action CycloneDX export.
- actions/attest-build-provenance@v3 signs the digest and pushes the
attestation to the registry, getting us SLSA Build L3 alignment.
- VPS deploy IMAGE switches from tag-based (":latest" / ":${version}")
to digest-based (@${steps.build.outputs.digest}) so the rollout pulls
exactly the artifact we just attested.
- permissions: + id-token:write, attestations:write (required by the
attestation action).
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From the 2026-05-01 audit:
Changes
node:20-alpine(EOL 2026-04-30) →node:22-alpine@sha256:cb15fca…read_only,/tmptmpfs,cap_drop: [ALL],security_opt: no-new-privileges. Comments explain when to relax.docker/build-push-actionnow emitsprovenance: true+sbom: trueanchore/sbom-actionexports CycloneDX JSON as artifactactions/attest-build-provenance@v3signs digest, pushes attestation to GHCRIMAGEswitches from:tagto@sha256:digestpermissions:+id-token: write,attestations: writeTest plan
docker pull+docker runagainst the deployed digest