feat: multiarch build

README.md

@@ -162,6 +162,30 @@ cd ../spore-ui && make docker-build
 make push
 ```
 
+### Building Multiarch Images (amd64 & arm64)
+
+For Raspberry Pi and other ARM devices, build multiarch images:
+
+```bash
+# One-time setup (run the setup script)
+./scripts/setup-multiarch.sh
+
+# Or setup manually:
+docker run --rm --privileged tonistiigi/binfmt:latest --install all
+docker buildx create --name multiarch --use
+docker buildx inspect --bootstrap
+
+# Build and push all multiarch images
+cd spore-deployment
+make push-multiarch
+
+# Or build without pushing
+make build-multiarch
+
+# Or build for specific tag
+make push-multiarch IMAGE_TAG=v1.0.0
+```
+
 ### Environment Variables
 
 #### Docker Compose