cert-manager-webhook-example/.github/workflows/release-image.yml

name: Build and Publish Docker Image

on:
  push:
    branches:
      - '*'
    tags:
      - '*'

jobs:
  build-and-publish:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

    steps:
      - name: Check Out Repository
        uses: actions/checkout@v4

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Log in to GitHub Container Registry
        if: startsWith(github.ref, 'refs/tags/')
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract Tag Name
        if: startsWith(github.ref, 'refs/tags/')
        id: tag_name
        run: echo "::set-output name=TAG_NAME::${GITHUB_REF##*/}"

      - name: Build Docker Image
        uses: docker/build-push-action@v5
        with:
          context: .
          file: Dockerfile
          push: ${{ startsWith(github.ref, 'refs/tags/') }}
          tags: |
            ghcr.io/${{ github.repository }}:latest
            ghcr.io/${{ github.repository }}:1
            ${{ steps.tag_name.outputs.TAG_NAME != '' && format('ghcr.io/{0}:{1}', github.repository, steps.tag_name.outputs.TAG_NAME) }}