9.5 Build and push an image (GHCR sketch)

# sketch — adjust package name / visibility for your account
env:
  IMAGE: ghcr.io/${{ github.repository_owner }}/badge-api

jobs:
  docker:
    needs: test
    if: github.ref == 'refs/heads/main'
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    steps:
      - uses: actions/checkout@v4

      - name: Log in to GHCR
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build and push
        uses: docker/build-push-action@v6
        with:
          context: .
          push: true
          tags: |
            ${{ env.IMAGE }}:${{ github.sha }}
            ${{ env.IMAGE }}:latest