docker_publish.yml

name: Publish Docker Image
on:
  push:
    branches:
      - main
  workflow_dispatch:
  workflow_call:

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}
jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    steps:
      - uses: actions/checkout@v3

      # Install the cosign tool except on PR
      # https://github.com/sigstore/cosign-installer
      - name: Install cosign
        if: github.event_name != 'pull_request'
        uses: sigstore/cosign-installer@main
        with:
          cosign-release: 'v1.7.1'

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v2
        with:
          platforms: linux/amd64,linux/arm64

      - name: Setup Docker buildx
        uses: docker/setup-buildx-action@v2

      - name: Log into registry ${{ env.REGISTRY }}
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v2
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
        # Extract metadata (tags, labels) for Docker
        # https://github.com/docker/metadata-action

      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v4
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

      - name: LowerCase repository name
        run: echo IMAGE_REPOSITORY=$(echo ${{ github.repository }} | tr '[:upper:]' '[:lower:]') >> $GITHUB_ENV

      # Build and push Docker image with Buildx (don't push on PR)
      # https://github.com/docker/build-push-action
      - name: Build and push Docker image
        id: build-and-push
        uses: docker/build-push-action@v3
        with:
          file: Dockerfile
          context: .
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ env.REGISTRY }}/${{ env.IMAGE_REPOSITORY }}:latest
          labels: ${{ steps.meta.outputs.labels }}
          platforms: linux/amd64, linux/arm64
          cache-from: type=gha
          cache-to: type=gha,mode=max