Building a CI/CD Pipeline with GitHub Actions

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

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

jobs:
  test:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4

      - name: Set up Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '20'
          cache: 'npm'

      - name: Install dependencies
        run: npm ci

      - name: Lint
        run: npm run lint

      - name: Test
        run: npm test

steps:
  - name: Deploy
    env:
      API_KEY: ${{ secrets.API_KEY }}
      DB_URL: ${{ vars.DATABASE_URL }}
    run: ./deploy.sh

steps:
  - name: Deploy to production
    if: github.ref == 'refs/heads/main' && github.event_name == 'push'
    run: ./deploy-prod.sh

  - name: Slack notification
    if: always()
    run: ./notify-slack.sh

jobs:
  test:
    strategy:
      matrix:
        node-version: [18, 20, 22]

    runs-on: ubuntu-latest
    steps:
      - uses: actions/setup-node@v4
        with:
          node-version: ${{ matrix.node-version }}

- name: Log in to Docker Hub
  uses: docker/login-action@v3
  with:
    username: ${{ secrets.DOCKER_USERNAME }}
    password: ${{ secrets.DOCKER_TOKEN }}

- name: Build and push image
  uses: docker/build-push-action@v5
  with:
    context: .
    push: true
    tags: myapp:${{ github.sha }}
    cache-from: type=gha
    cache-to: type=gha,mode=max

- name: Deploy to server
  uses: appleboy/ssh-action@v1
  with:
    host: ${{ secrets.SSH_HOST }}
    username: deploy
    key: ${{ secrets.SSH_KEY }}
    script: |
      cd /opt/myapp
      git pull origin main
      docker compose up -d --build