docker-publish.yml

name: Docker

# This workflow builds Docker images on push to main/dev branches
# and publishes (pushes) them to GHCR on version tags.

on:
  push:
    branches:
      - main
      - dev
    tags:
      - "v*"

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

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

    strategy:
      matrix:
        include:
          - context: .
            file: server/Dockerfile
            image: ghcr.io/${{ github.repository }}-backend
          - context: ui
            file: ui/Dockerfile
            image: ghcr.io/${{ github.repository }}-frontend

    steps:
      - name: Free Disk Space
        uses: jlumbroso/free-disk-space@main
        with:
          tool-cache: true
          android: true
          dotnet: true
          haskell: true
          large-packages: true
          swap-storage: true

      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          submodules: "true"

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

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

      - name: Log in to the Container registry
        # Only login if we are going to push
        if: startsWith(github.ref, 'refs/tags/v')
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ matrix.image }}
          tags: |
            # Tag with the exact git tag
            type=ref,event=tag
            # Extract version from tag (stripping 'v' prefix if present)
            type=match,pattern=v(.*),group=1
            # Standard semver (if valid)
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            # Branch and SHA
            type=ref,event=branch
            type=sha
            # latest tag only for stable releases (no 'a', 'b', 'rc' etc. in the tag name)
            type=raw,value=latest,enable=${{ github.ref_type == 'tag' && !contains(github.ref_name, 'a') && !contains(github.ref_name, 'b') && !contains(github.ref_name, 'rc') }}

      - name: Build and push Docker image
        uses: docker/build-push-action@v5
        with:
          context: ${{ matrix.context }}
          file: ${{ matrix.file }}
          # Only push on tags
          push: ${{ startsWith(github.ref, 'refs/tags/v') }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max