Setup multi-platform Docker images to support both x86 and arm architectures

Author: Jan van der Pas

.github/workflows/release.yml

@@ -47,6 +47,12 @@ jobs:
     steps:
       - name: Checkout Elementary
         uses: actions/checkout@v3
+        
+      - name: Set up QEMU for multi-platform support
+        uses: docker/setup-qemu-action@v3
+      
+      - name: Set up Docker Buildx for multi-platform support
+        uses: docker/setup-buildx-action@v3
 
       - name: Log in to the container registry
         uses: docker/login-action@v2
@@ -66,6 +72,7 @@ jobs:
         with:
           context: .
           push: true
+          platforms: linux/amd64,linux/arm64
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}