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@v3
    - name: Setup Docker buildx
      uses: docker/setup-buildx-action@v3
    - 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@v5
      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, linux/arm/v7
        cache-from: type=gha
        cache-to: type=gha,mode=max