ci: disable linux/arm64 container building for now

Author: xen0n

.github/workflows/deploy.yml

@@ -60,7 +60,7 @@ jobs:
         uses: docker/build-push-action@v6
         with:
           context: '.'
-          platforms: linux/amd64,linux/arm64  # linux/riscv64 not yet supported by the base image
+          platforms: linux/amd64  # linux/arm64 too slow to build, linux/riscv64 not yet supported by the base image
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}

scripts/test-build-image.sh

@@ -47,7 +47,7 @@ add_annotation org.opencontainers.image.revision "$git_commit"
 
 args=(
     --rm
-    --platform "linux/amd64,linux/arm64"  # linux/riscv64 is not yet supported
+    --platform "linux/amd64"  # linux/arm64 too slow to build, linux/riscv64 is not yet supported
     -o "$output_param"
     .
 )