Use multiarch build

.github/workflows/build.yml

@@ -11,7 +11,9 @@ env:
 jobs:
   build-and-push-image:
     runs-on: ubuntu-latest
-    # Sets the permissions granted to the `GITHUB_TOKEN` for the actions in this job.
+    strategy:
+      matrix:
+        os: [ ubuntu-latest, macos-latest ]
     permissions:
       contents: read
       packages: write
@@ -38,6 +40,7 @@ jobs:
           context: .
           push: true
           tags: ${{ steps.meta.outputs.tags }}
+          platforms: linux/amd64,linux/arm64
           labels: ${{ steps.meta.outputs.labels }}
       - name: Generate artifact attestation
         uses: actions/attest-build-provenance@v1