Angular CI on GitHub Actions

ng build and ng test both start from a cold cache each run.

Why it happens

Angular's build cache in .angular/cache is not persisted, so the whole graph recompiles.

What to change

1. Cache .angular/cache keyed on the lockfile
2. Run tests headless with --no-watch --browsers=ChromeHeadless
3. Use Nx or the Angular build cache if you have more than a couple of libraries

Angular on runnerhut

jobs:
  test:
    runs-on: runnerhut-4vcpu-ubuntu-2404
    steps:
      - uses: actions/checkout@v4
      - run: npm ci
      - run: npx ng test --no-watch --browsers=ChromeHeadless
      - run: npx ng build --configuration production

The only runnerhut-specific line is `runs-on: runnerhut-4vcpu-ubuntu-2404`. Everything else is standard GitHub Actions — the same actions, the same secrets and the same permissions model you use today.