Files
shopdb-flask/docs/deployment/DOCKER-PREBUILT-APPROACH.md
cproudlock f9d6b57f0f Move the documentation to the line that ships, and correct it against the code
The docs lived on one lineage and the fleet code on another. That is why six
pages described a shared fleet key as how an agent authenticates, why
COLLECTOR-AUTH had to warn that the per-PC credential code was not in the
repository it sat in, and why ADR-019 recorded a decision whose implementation
was somewhere else. Documentation that cannot see the code it documents goes
stale by construction, and no amount of editing fixes that.

So the corpus moves here: 84 files, 56 pages, 20 ADRs, the proposals, INDEX.md,
llms.txt and both gates. Filenames are unchanged, because a wiki page name is
derived from the filename and a rename breaks every link anybody saved.

THE POINT OF THE MOVE IS THE CORRECTION IT ENABLES. Every caveat that said "not
in this tree" was false the moment the files landed beside the code, so each was
rewritten from what is actually here:

- COLLECTOR-AUTH gained the real enroll request body, the two bounds on the
  unauthenticated route (per-IP rate limit, pending cap with stale rows dropped
  before a real PC is refused), and the rejected pending reason that binds to
  the endpoint identity rather than the nonce.
- ADR-019 now describes an implementation that is present, including its tests,
  and says plainly that what remains is the FLEET migration, not the code.
- proposals/device-identity claimed phase 1 was unbuilt. plugins/computers
  declares deviceid on the collector schema and prefers it over the older
  fallbacks. Corrected in the page, its summary and the index.

WINDOWS/IIS IS NOW DOCUMENTED AS THE LEGACY PATH, per the product decision, and
carefully: it is what production runs today. Every Windows page opens by saying
it is supported, not for a new site, and where a new site should go instead. No
procedure was cut - an operator on an IIS box at 2am needs these pages to work
exactly as well tomorrow. MIGRATE-TOPOLOGY stops being a footnote and becomes
the off-ramp, which is why it nearly doubled: what was there did not match how
the Docker stack really works here.

The Docker material that already lived on this line was kept and given
ownership rather than buried under the ported Windows-centric prose: DEPLOY now
describes the four services, the migrate service that runs the upgrade chain
before api starts, TLS terminated by nginx, and the plugin count corrected from
thirteen to seventeen - a number both lineages had wrong.

ROADMAP is rewritten from evidence rather than memory: what has shipped, read
out of the changelog, the ADRs and the manifests, and ahead of it exactly two
items - finalize a distributed release and polish the setup wizard.

PROJECT-MAP is generated and was stale; the GENERATOR was what was wrong.
--check passes now.

API-REFERENCE is retired to a pointer. /api/docs serves 573 operations with
derived auth, query parameters and harvested examples, and a hand-written page
competing with that is a liability. The file stays so its wiki page and its
inbound links survive.

AND THE MOVE TURNED ON A SCRUB THAT HAD NEVER RUN HERE. test_docs_publishable
keys on docs/*.md, which this line did not have, so it skipped - its own comment
predicted what would surface. Porting the corpus activated it and it found 48
lines that must not reach a published wiki: branch names abbreviating the site,
assistant-tooling paths, the site name in two deployment pages, and an employee
ID in a Windows path that the scrub does not even look for.
2026-09-19 09:10:15 -04:00

3.6 KiB

Building the image with a pre-built frontend

Where this sits: a variant of Step 2 of DEPLOY, not a separate deployment. Everything else on that page still applies.

The shipped Dockerfile is a multi-stage build: stage 1 runs npm ci and npm run build under Node, stage 2 copies the compiled SPA into the Python image. Behind a proxy that re-signs HTTPS, stage 1 is where it dies - npm inside the container does not trust the corporate root CA, and the failure reads npm ci failed or the unhelpful Exit handler never called.

The fix is to build the frontend where npm already works - the host, which has the corporate CA in its trust store - and give the image the finished frontend/dist/.

It is also much faster: two to three minutes instead of fifteen. A site with no proxy problem at all may want it for that reason alone.

Do it

# 1. Build the frontend on the host
cd frontend
npm ci
npm run build          # writes frontend/dist/
cd ..

# 2. Build and start the stack from the pre-built dist
docker compose -f docker-compose.prebuilt.yml build
docker compose -f docker-compose.prebuilt.yml up -d

The rest is DEPLOY unchanged: the migrate service runs the schema, the plugin bootstrap and the seeders before api starts, nginx terminates TLS on API_PORT, and the first admin comes from /setup or flask seed admin.

The files this uses

File What it is
Dockerfile.prebuilt single-stage: Python dependencies plus a copy of frontend/dist/. No Node, no npm
docker-compose.prebuilt.yml the same stack, building from Dockerfile.prebuilt
.dockerignore.prebuilt permits frontend/dist/ to be copied, which the normal .dockerignore excludes

What it costs

  • npm has to exist on the build host. That is the whole trade: the trust problem moves from the container to a machine that has already solved it.
  • It is two steps, and forgetting the first one ships a stale UI. The image copies whatever is in frontend/dist/ at build time. A frontend change that was not rebuilt is simply not in the image, and nothing warns you. If the UI does not show your change, rebuild dist/ before debugging anything else.
  • frontend/dist/ has to reach the build. Either it is committed, or the pipeline builds it immediately before the image.

The version of this that scales

The pre-built approach is a workaround for building at the deployment site. The end state is not building there at all:

# CI: build the frontend, build the image, push it
- run: cd frontend && npm ci && npm run build
- run: docker build -f Dockerfile.prebuilt -t shopdb:$GIT_SHA .
- run: docker push <registry>/shopdb:$GIT_SHA

A site then pulls a tagged image and runs it - seconds, no build step, no npm anywhere near the facility. docker-compose.pull.yml is the compose file for that shape today, and docker-compose.airgap.yml is the same idea for a site that loads an image tarball off removable media (DEPLOY-AIRGAP). Finishing that path is the distributed release item on ROADMAP.

Approach Build time Behind a re-signing proxy Where it belongs
Multi-stage Dockerfile 15+ min fails unless the CA is staged a developer box with a clean network
Pre-built frontend (this page) 2-3 min works a site that must build locally
Pull a published image seconds works where every site should end up