CI/CD with GitHub Actions

# .github/workflows/deploy.yml
name: CI/CD Pipeline

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

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  test:
    runs-on: ubuntu-latest
    services:
      postgres:
        image: postgres:16
        env:
          POSTGRES_PASSWORD: testpass
          POSTGRES_DB: testdb
        options: >-
          --health-cmd pg_isready
          --health-interval 10s

    steps:
      - uses: actions/checkout@v4

      - uses: actions/setup-node@v4
        with:
          node-version: '20'
          cache: 'npm'

      - name: Install dependencies
        run: npm ci

      - name: Run linter
        run: npm run lint

      - name: Run tests
        run: npm test -- --coverage
        env:
          DATABASE_URL: postgres://postgres:testpass@localhost/testdb

      - name: Upload coverage
        uses: codecov/codecov-action@v3

  build-and-push:
    needs: test  # Only runs if tests pass
    runs-on: ubuntu-latest
    if: github.ref == 'refs/heads/main'

    steps:
      - uses: actions/checkout@v4

      - name: Login to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build and push Docker image
        uses: docker/build-push-action@v5
        with:
          push: true
          tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest

  deploy:
    needs: build-and-push
    runs-on: ubuntu-latest

    steps:
      - name: Deploy to production
        uses: appleboy/ssh-action@v1
        with:
          host: ${{ secrets.PROD_HOST }}
          username: deploy
          key: ${{ secrets.SSH_PRIVATE_KEY }}
          script: |
            docker pull ghcr.io/${{ github.repository }}:latest
            docker-compose up -d --no-deps web
            docker system prune -f