feat: add support for multi-platform builds

Author: anna-geller

.github/workflows/main.yml

@@ -9,56 +9,65 @@ on:
 
 jobs:
   changes:
-    name: Dockerfile changes
+    name: Dockerfile Changes
     runs-on: ubuntu-latest
     outputs:
       dockerfiles: ${{ steps.filter.outputs.dockerfiles_files }}
       dockerfiles_changed: ${{ steps.filter.outputs.dockerfiles }}
     steps:
-      - name: Checkout
+      - name: Checkout repository
         uses: actions/checkout@v4
-      - uses: dorny/paths-filter@v3
+
+      - name: Filter Dockerfile changes
+        uses: dorny/paths-filter@v3
         id: filter
         with:
           list-files: json
           filters: |
             dockerfiles:
               - added|modified: 'dockerfiles/*.Dockerfile'
+
       - name: Generate Markdown Summary
-        run: | 
-          echo New/modified Dockerfiles: ${{ steps.filter.outputs.dockerfiles_files }} >> $GITHUB_STEP_SUMMARY
+        run: echo "New/modified Dockerfiles: ${{ steps.filter.outputs.dockerfiles_files }}" >> $GITHUB_STEP_SUMMARY
 
   ghcr:
-    needs: [changes]
+    needs: changes
     if: ${{ needs.changes.outputs.dockerfiles_changed == 'true' }}
     runs-on: ubuntu-latest
     permissions:
       contents: read
       packages: write
     strategy:
-      matrix: 
+      matrix:
         image: ${{ fromJson(needs.changes.outputs.dockerfiles) }}
     steps:
-      - name: checkout
+      - name: Checkout repository
         uses: actions/checkout@v4
 
-      - name: GHCR Login
-        uses: docker/login-action@v2
+      - name: Set up QEMU for cross-platform builds
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to GHCR
+        uses: docker/login-action@v3
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
-      
+
       - id: image-tag  # example output: "ghcr.io/kestra-io/pydata:latest"
         run: |
-          export IMAGE=$(basename ${{ matrix.image }} .Dockerfile)
+          IMAGE=$(basename ${{ matrix.image }} .Dockerfile)
           echo "image_url=ghcr.io/kestra-io/$IMAGE:latest" >> $GITHUB_OUTPUT
           echo "file=${{ matrix.image }}" >> $GITHUB_OUTPUT
-      
+
       - name: Build and push Docker image
         uses: docker/build-push-action@v4
         with:
           context: .
           push: true
           tags: ${{ steps.image-tag.outputs.image_url }}
           file: ${{ steps.image-tag.outputs.file }}
+          platforms: linux/amd64,linux/arm64

.github/workflows/scheduled.yml

@@ -1,4 +1,4 @@
-name: Container Image Packages
+name: Scheduled Container Image Packages
 
 on:
   schedule: