feat: support linux/arm64 docker image (#1851)

Closes #1815

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: kunish

.github/workflows/release.yml

@@ -112,7 +112,7 @@ jobs:
           builder: ${{ steps.buildx.outputs.name }}
           file: Dockerfile
           push: true
-          platforms: linux/amd64
+          platforms: linux/amd64,linux/arm64
           cache-from: type=gha
           cache-to: type=gha,mode=max
           tags: |