integration(full pod): decouple frontend build from backend/integration CI

[Anthony Sligar (sligara7)]

Problem

The full pod end-to-end CI job brings up the pod with docker compose up --build -d, which builds and starts every service defined in integration/pods/full/docker-compose.yaml — including the frontend. However, that job only exercises the backends: the health gate waits on :8004/:8003, and every exercise step hits configuration_service / direct_control / registry. The frontend is built but never tested.

That coupling means a frontend-team change can break backend/integration CI even though the frontend isn't under test. Concretely, PR #68 (a frontend SSR PR) turned the whole full pod end-to-end job red at the build step — first with a dockerfile parse error ... unknown instruction: Containerfile (a botched Dockerfile→Containerfile symlink), then with set -euxo pipefail failing under /bin/sh (dash) in a RUN step. Neither has anything to do with the backends this job is meant to validate.

Fix

Gate the frontend service behind a Compose frontend profile so it is no longer built/started by the default docker compose up used in CI, while remaining available on demand:

docker compose --profile frontend up --build

This keeps the backend/integration CI self-contained and owned by the backend team, consistent with the frontend-ownership boundary already documented in the root docker-compose.yml ("The frontend container is intentionally NOT defined here — that's the frontend team's responsibility").

Scope / notes

• Only integration/pods/full/docker-compose.yaml changes (one service gains profiles: ["frontend"], plus header/usage comments).
• The dev pod (integration/pods/dev) — whose purpose is frontend development and which is not run in CI — is intentionally left unchanged.
• No workflow change is required: docker compose up --build -d now simply skips the profiled service.

Verification

# default (CI path) — frontend excluded:
$ docker compose config --services
configuration_service direct_control_service ioc ioc_adsim ioc_fake_motor \
ioc_random_walk ioc_random_walk_h ioc_random_walk_v ioc_thermo postgres

# on demand — frontend included:
$ docker compose --profile frontend config --services | grep frontend
frontend

Co-authored-by: Copilot 223556219+Copilot@users.noreply.github.com