Build amd64 and arm64 images

Author: tarleb

.github/workflows/debian.yaml

@@ -20,6 +20,12 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
       - name: Login to Docker Hub
         uses: docker/login-action@v3
         if: ${{ env.PUSH_IMAGE }}
@@ -32,5 +38,6 @@ jobs:
         with:
           file: '3.5/bookworm/Dockerfile'
           context: '.'
+          platforms: linux/amd64,linux/arm64/v8
           push: ${{ env.PUSH_IMAGE }}
-          tags: '3.5-debian'
+          tags: 'pandoc/core:3.5-debian'