build.yml

name: Publish to container registry

on:
  push:
    branches:
      - v*
  release:
    types: [ "published" ]
  # The "Sync branch" workflow doesn't trigger the push event, therefore we need a separate trigger for that
  workflow_run:
    workflows: [Sync branch]
    types:
      - completed

env:
  # Use docker.io for Docker Hub if empty
  REGISTRY: ghcr.io
  # github.repository as <account>/<repo>
  IMAGE_NAME: ${{ github.repository }}
  # Branch to build the container image from
  BRANCH: v1

jobs:
  build:
    runs-on: ubuntu-latest

    permissions:
      contents: read
      packages: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
        with:
          ref: ${{ env.BRANCH }}

      - name: Get Node Version
        run: echo "NODE_VERSION=$(cat .node-version)" >> $GITHUB_ENV

      # Login against a Docker registry except on PR
      # https://github.com/docker/login-action
      - name: Log into registry ${{ env.REGISTRY }}
        uses: docker/login-action@650006c6eb7dba73a995cc03b0b2d7f5ca915bee # v4
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # Set up BuildKit Docker container builder to be able to build multi-platform images and export cache
      # https://github.com/docker/setup-buildx-action
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@d7f5e7f509e45cec5c76c4d5afdd7de93d0b3df5 # v4

      # Extract metadata (tags, labels) for Docker
      # https://github.com/docker/metadata-action
      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@80c7e94dd9b9319bd5eb7a0e0fe9291e23a2a2e9 # v6
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

      # 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@f9f3042f7e2789586610d6e8b85c8f03e5195baf # v7
        with:
          context: .
          platforms: linux/amd64,linux/arm64
          push: true
          build-args: |
            NODE_VERSION=${{ env.NODE_VERSION }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max