Fix #345 - Build ARM64 image. (#346)

* Fix #245 - Build ARM64 image.

* Attempt to work around: docker/buildx#59

* Only build arm64 on release.

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Co-authored-by: Laurent Quérel <l.querel@f5.com>

.github/workflows/publish-docker.yml

@@ -20,6 +20,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:      
     - uses: actions/checkout@v4
+    - name: Set up QEMU
+      uses: docker/setup-qemu-action@v3
     - name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v3
     - name: Extract metadata (tags, labels) for Docker
@@ -48,6 +50,7 @@ jobs:
       if: github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/')
       with:
         push: true
+        platforms: linux/amd64,linux/arm64
         provenance: mode=max
         sbom: true
         tags: ${{ steps.meta.outputs.tags }}