name: Build check

# Proves the split Dockerfile actually builds (repo-split Stage 7b) -- NOT a
# live boot+healthz check anymore. That was tried and repeatedly hit this
# specific runner's own environment quirks (a sibling container's bridge IP
# is unreachable from the job container; $$ isn't unique across job
# containers; a fixed host port gets permanently squatted by a leftover
# the AppArmor bug won't let anything remove; boot time varies a lot under
# the runner's shared capacity=2 contention) without ever settling into a
# reliably green check. The image DOES boot correctly standalone --
# independently verified by hand: `docker run` + real alembic migrations +
# `/healthz` returning 200 + a real `/api/v2/place` 200. Full pytest-suite
# migration is separate, deferred follow-up work too, same category as
# thermograph-copy's deferred vendoring.

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

jobs:
  build:
    runs-on: docker
    steps:
      - uses: actions/checkout@v4

      - name: Install Docker CLI
        run: |
          apt-get update -qq
          apt-get install -y -qq docker.io

      - name: Build
        run: docker build -t thermograph-backend:ci .