github action 사용법

name: Basic Workflow
on: [push]  # push 이벤트 발생 시 실행

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - name: Run a script
        run: echo "Hello, GitHub Actions!"

name: Node.js CI
on: [push]

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: actions/setup-node@v1
        with:
          node-version: '16'
      - run: npm install
      - run: npm test

name: Spring Boot CI
on:
  pull_request:
    branches: [main]

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: actions/setup-java@v2
        with:
          java-version: '11'
      - run: "./gradlew build"

name: Docker Build
on:
  push:
    branches: [main]

jobs:
  docker:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - name: Build and push Docker image
        uses: docker/build-push-action@v2
        with:
          push: true
          tags: user/app:latest

jobs:
  example-job:
    runs-on: ubuntu-latest
    env:
      DB_URL: ${{ secrets.DATABASE_URL }}
    steps:
      - name: Use environment variable
        run: echo $DB_URL

steps:
  - name: Run only on main branch
    if: github.ref == 'refs/heads/main'
    run: echo "This runs only on main branch"