fix: add linux/arm64 to image platforms

Author: joaquimds

.github/workflows/deploy.yaml

@@ -36,6 +36,7 @@ jobs:
           context: .
           push: true
           tags: ghcr.io/${{ github.repository_owner }}/do-app-baseimage-django-node:${{ github.sha }}
+          platforms: linux/amd64,linux/arm64
           cache-from: type=local,src=/tmp/.buildx-cache
           cache-to: type=local,dest=/tmp/.buildx-cache-new