Why should you care?

Manual deploys skip tests; automation enforces quality gate.

See it live — copy this example

Paste into your MeanVerse project (Angular + Express + MongoDB), then run with ng serve / node / mongosh as noted.

# .github/workflows/api-ci.yml
name: API CI
on: [push, pull_request]
jobs:
  test:
    runs-on: ubuntu-latest
    services:
      mongo: { image: mongo:7, ports: ['27017:27017'] }
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with: { node-version: '20' }
      - run: npm ci
        working-directory: api
      - run: npm test
        working-directory: api
        env: { MONGO_URI: mongodb://localhost:27017/meanverse_test }
  build:
    needs: test
    runs-on: ubuntu-latest
    steps:
      - uses: docker/build-push-action@v6
        with: { push: true, tags: ghcr.io/meanverse/api:${{ github.sha }} }

What happened?

• push triggers workflow.
• mongo service container for integration tests.
• build job pushes image tagged with git sha for traceability.

Practice next

1. Add workflow on pull_request to main.
2. Cache npm with actions/cache.
3. Fail PR if lint or test fails.
4. Add deploy job to AKS with kubectl.
5. Run npm audit in workflow fail on critical.

Remember

Actions = CI/CD in repo. Test before build and deploy. Image tag = git sha for rollback.

PR quality gate

Junior dev breaks transfer validation.

Outcome: CI fails; merge blocked until fix — prod safe.