publish.yml

name: Publish

on: push

env:
    # Use docker.io for Docker Hub if empty
    REGISTRY: ghcr.io
    # github.repository as <account>/<repo>
    IMAGE_NAME: ${{ github.repository }}

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

        steps:
            - name: Checkout repository
              uses: actions/checkout@v4

            # Login against a Docker registry
            # https://github.com/docker/login-action
            - name: Log into registry ${{ env.REGISTRY }}
              uses: docker/login-action@v3
              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@v5
              with:
                  images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

            # Build and push Docker image with Buildx
            # https://github.com/docker/build-push-action
            - name: Build and push Docker image
              uses: docker/build-push-action@v5
              with:
                  context: .
                  push: true
                  tags: ${{ steps.meta.outputs.tags }}
                  labels: ${{ steps.meta.outputs.labels }}