feat: factory aarch builds

.github/workflows/docker-publish-factory.yml

@@ -40,6 +40,9 @@ jobs:
         with:
           submodules: true
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
       - name: Setup buildx
         uses: docker/setup-buildx-action@v3
 
@@ -63,6 +66,7 @@ jobs:
       - name: Docker Build
         uses: docker/build-push-action@v5
         with:
+          platforms: linux/amd64,linux/arm64
           context: ./factory-container
           file: ./factory-container/Dockerfile
           push: ${{ github.event_name != 'pull_request' }}
@@ -72,4 +76,4 @@ jobs:
             klipper_repo=${{ inputs.klipperRepo }}
             klipper_ref=${{ inputs.klipperVer }}
           cache-from: type=gha
-          cache-to: type=gha,mode=max
+          cache-to: type=gha,mode=max