fix(docker): copy .npmrc before npm ci and pin the Node major to .nvmrc - #4061
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The Dockerfile ran npm ci before COPY . . landed .npmrc, so engine-strict=true never reached the install: an unsupported base image reproduced a confusing lockfile-sync error instead of a clean EBADENGINE. FROM node:lts-slim also floats independently of .nvmrc/ engines.node and will silently drift once Node 26 becomes LTS. Copy .npmrc alongside package*.json before npm ci, and pin the image to node:24-slim (the .nvmrc major) instead of the floating lts-slim tag. Add a drift-guard unit test asserting the Dockerfile major and .nvmrc major match, so the two can't diverge unnoticed again. Closes #4060 Claude-Session: https://claude.ai/code/session_0185ELiCjZaBJx8PH4xoSsZb
The Dockerfile ↔ .nvmrc/.npmrc drift guard only inspected the first FROM and the first COPY/RUN pair, so a multi-stage split with a correct build stage but a drifted runtime stage (the one that actually ships) passed silently. Split the Dockerfile into per-stage blocks and check every stage: every FROM node:* must match the .nvmrc major, and every stage that runs npm ci must copy .npmrc first in that same stage. Stage-boundary detection is kept separate from image-token parsing so an unrecognized FROM shape (e.g. a --platform flag) throws instead of being silently absorbed into the previous stage — the same blind-spot class the original finding was about. Claude-Session: https://claude.ai/code/session_0185ELiCjZaBJx8PH4xoSsZb
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WalkthroughThe Dockerfile now pins Node.js to version 24, copies ChangesDocker toolchain consistency
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: 🔵 Low · up to Docker builds now use Node 24 and load npm configuration before dependency installation, improving engine-version enforcement. The remaining risk is limited to documenting the new test helper to meet repository conventions. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Coverage 94.12% 94.12%
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In `@scripts/tests/dockerfileToolchain.unit.tests.js`:
- Line 63: Update the JSDoc header for the named getStages helper to include a
one-line description, an `@param` tag for text, and an `@returns` tag describing its
returned stage array.
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DockerfileERRORS.mdscripts/tests/dockerfileToolchain.unit.tests.js
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The stage-splitter is a named helper, so the repo JSDoc guideline applies to it — the test-file exception covers anonymous test-framework callbacks only. Documents the returned stage shape and the deliberate throw on an unparseable FROM line. Claude-Session: https://claude.ai/code/session_0185ELiCjZaBJx8PH4xoSsZb
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Dismissed by the repo owner's instruction. CodeRabbit's single finding — missing JSDoc tags on the named getStages helper — was correct and is fixed in 624124f; the thread was replied to and resolved. It then could not re-review: the trigger returned "Review rate limited", and it does not re-review already-reviewed commits.
An independent reviewer stood in on that tail commit and returned OK, zero findings: comment-only confirmed mechanically (8 insertions, 0 deletions, every added line a comment), all three JSDoc tags verified accurate against getStages' actual behaviour, lint and the guard test green, and both guard failure shapes re-confirmed firing with the Dockerfile byte-identical after the probes.
The PR body records the rest: three real Docker builds proving the fail-fast now reaches the image, and a nine-shape table for the stage-aware guard.
1 participant
What
The recent toolchain pinning (
engines.node >=24.15.0,.nvmrc,.npmrcwithengine-strict=true, CI readingnode-version-file) left theDockerfileuntouched, so the path that actually ships still carried both of the original problems.1. The fail-fast never reached the Docker build. The Dockerfile copied
package*.json, rannpm ci, and only then didCOPY . .— so.npmrcarrived after the install..npmrcnow rides the same pre-install COPY line.2.
FROM node:lts-slimfloated independently of everything else. It resolves to Node 24 today, but Node 26 goes Active LTS around October 2026, at which point Docker silently moves while CI and.nvmrcstay pinned at 24. Nownode:24-slim, matching.nvmrc.Proven by building it, three times
node:20-slimnpm error Missing: conventional-commits-filter@6.0.1 from lock file— the exact confusing symptom the issue describesnode:20-slimnpm error code EBADENGINE … Required: {"node":">=24.15.0"} Actual: {"node":"v20.20.2"}, at the npm-ci step, before any package installnode:24-slim)Reproduced independently by a second reviewer from a clean
--no-cachebuild.Why a pinned literal and not a build-arg
The issue suggested deriving the tag from
.nvmrc.FROMcannot read a file, and the alternative — anARGwith a default that CI overrides — has nothing to hook into: CI has nodocker buildstep at all, it installs viaactions/setup-nodereading.nvmrcdirectly. A build-arg pipeline nobody wires up is worse than a literal someone can grep.So the major is restated in two files, and
scripts/tests/dockerfileToolchain.unit.tests.jsis what stops them drifting: it reads both files and fails if the majors diverge, and asserts.npmrcis copied beforenpm ci. It runs in the existing unit job — no new CI wiring.The guard is stage-aware, because the first version wasn't
Review found the guard used unflagged
.match()/.search(), so it only inspected the firstFROMand the first COPY/RUN pair. A multi-stage Dockerfile with a correct build stage and a drifting runtime stage — the one that ships — passed silently. Verified, then fixed: it now splits into per-stage blocks and checks every stage.Behaviour on nine shapes, each constructed and run:
.npmrcbeforenpm ci.npmrcremoved from the pre-install COPY.npmrccopied by a later COPY afternpm ci.nvmrcchanged instead of the Dockerfilenode:lts-slimrestorednode:24-slim@sha256:…node:runtime stage running nonpm ciPlus: a lowercase
FROM … as buildwith runtime drift is caught, and an unparseableFROM(e.g.--platform=$BUILDPLATFORM) throws loudly rather than silently merging into the previous stage — a gap in the guard's own first draft.Documented trade-off: the
.npmrccheck is stage-local. A stage thatFROMs a named prior stage and re-runsnpm ciis flagged even though Docker would inherit the file. Deliberately false-positive-toward-loud rather than walking theFROMgraph.Checked and clear
Only one Dockerfile in the repo, single-stage.
docker-compose.ymluses a prebuiltimage:, never installs.docker-compose.test.ymlbuilds this same Dockerfile with no override..dockerignoreexcludes onlynode_modules, so the COPY is not inert..npmrccontainsengine-strict=trueand nothing else — and the pre-existingCOPY . .already swept it into the image, so this changes when it lands, not whether.Lint clean; 175 suites / 2459 unit tests green; no threshold touched.
Found, not fixed
docker-compose-production.ymlbuilds fromdockerfile: Dockerfile-production, which was deleted in an unrelated earlier commit (c3939adf) and exists nowhere in the repo. It sits alongsidemongo:3.2services — pre-existing dead configuration, unrelated to this change.Closes #4060
https://claude.ai/code/session_0185ELiCjZaBJx8PH4xoSsZb
Summary by CodeRabbit
Chores
Tests