fix: native matrix + merge-manifests Docker build (replaces QEMU) - #22
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Build amd64 on ubuntu-latest and arm64 on ubuntu-24.04-arm in parallel, each pushing a per-arch digest. A final merge job assembles them into a single multi-arch manifest using docker buildx imagetools create. This reduces arm64 build time from ~30 min (QEMU emulation) to ~3-4 min (native runner). Also adds continue-on-error to the Hub description step to prevent a token scope issue from failing an otherwise successful build.
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Feb 27, 2026
Squash merge of #22 omitted this commit. Applying directly to main. Setting push: true alongside outputs with push-by-digest=true caused the action to attempt a tagged push with no tag, triggering insufficient_scope on Docker Hub. name=target was a literal placeholder; replaced with the actual image name via format().
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Problem
The existing
docker.ymlbuilt bothlinux/amd64andlinux/arm64in a single job using QEMU emulation. QEMU arm64 emulation on a Node+Python multi-stage image takes 30+ minutes on free GitHub runners, making the build effectively unusable.Solution
Replace with the matrix + merge-manifests pattern:
buildjob (matrix) — two runners in parallel:linux/amd64onubuntu-latestlinux/arm64onubuntu-24.04-arm(GitHub's native ARM runner)Each runner builds its arch natively, pushes a digest-only image, and uploads the digest as an artifact.
mergejob — waits for both builds, downloads the digest artifacts, then callsdocker buildx imagetools createto assemble a single multi-arch manifest with all final tags (:latest,:<sha>, semver).Other changes
continue-on-error: trueadded to the Docker Hub description step — a token scope issue on the previous main-branch push caused that step to fail even though the image built successfully.scope=linux/amd64/scope=linux/arm64) so the caches don't overwrite each other.packages: writepermission removed (was kept speculatively for GHCR, not needed for Docker Hub).Expected outcome
talesofthemoon/networkcrawler:latestmanifest covers both architectures