chache arch

Author: previ

.github/workflows/build_backend.yml

@@ -88,7 +88,7 @@ jobs:
           tags: ${{ steps.meta.outputs.tags }}
           context: .
           file: docker/${{ matrix.architecture.dockerfile }}
-          cache-from: type=registry,ref=ghcr.io/coderbotorg/backend:latest
+          cache-from: type=registry,ref=ghcr.io/coderbotorg/backend:latest-${{ matrix.architecture.tag }}
           cache-to: type=inline
 
   release-stub: