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perf(docker): optimize builds with cache mounts and parallel stages - #47
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- Use BuildKit cache mounts for apt, npm, and apt/lists across all apt-get and npm install steps (eliminates manual cleanup) - Extract rtk and ralphex downloads into parallel multi-stage builds with COPY --from for faster image builds - Add SHELL pipefail directive for safer curl|sh piping - Consolidate OCI LABEL instructions into single layer - Add OCI labels to both default and sandbox targets Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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What
Optimizes Docker build performance for
claude-codeanddevcontainer-claude-bunimages using BuildKit cache mounts and parallel download stages.Why
Daily image rebuilds benefit from faster build times. Cache mounts avoid re-downloading apt packages and npm modules on each build, while parallel stages allow rtk and ralphex downloads to run concurrently with the main build.
Changes
claude-code): Split rtk and ralphex downloads into separateFROM alpinestages that BuildKit runs concurrently, thenCOPY --fromthe binaries into the final image--mount=type=cachefor apt (/var/cache/apt,/var/lib/apt/lists) and npm (/root/.npm) across allRUN apt-getandnpm installsteps in both imagesapt-get clean && rm -rf /var/lib/apt/lists/*since cache mounts handle layer efficiencySHELL ["/bin/bash", "-o", "pipefail", "-c"]around pipedcurl | shcommands for safetyLABELinstructions into single layer; added labels to bothdefaultandsandboxtargets inclaude-code🤖 Generated with Claude Code