Fix manifest list creation for multi-arch images

- Remove existing manifests before creating new ones
- Add architecture annotations for proper platform detection
- Ensures Docker pulls correct architecture automatically

.gitea/workflows/buildpublish.yaml

@@ -67,11 +67,22 @@ jobs:
 
               echo "Creating manifest for ${image_name}..."
 
-              # Create the manifest list using the architecture-specific digests
+              # Remove any existing manifest to ensure we create a fresh one
+              docker manifest rm gitea.jde.nz/public/${image_name}:latest 2>/dev/null || true
+
+              # Create the manifest list using the architecture-specific images
+              # Note: publish.sh uses uname -m which gives x86_64 and aarch64
               docker manifest create gitea.jde.nz/public/${image_name}:latest \
                 --amend gitea.jde.nz/public/${image_name}:latest-x86_64 \
                 --amend gitea.jde.nz/public/${image_name}:latest-aarch64
 
+              # Annotate the manifests with the correct architecture
+              docker manifest annotate gitea.jde.nz/public/${image_name}:latest \
+                gitea.jde.nz/public/${image_name}:latest-x86_64 --arch amd64
+
+              docker manifest annotate gitea.jde.nz/public/${image_name}:latest \
+                gitea.jde.nz/public/${image_name}:latest-aarch64 --arch arm64
+
               # Push the manifest list
               docker manifest push gitea.jde.nz/public/${image_name}:latest