Fix arm build

.github/workflows/builddockerimage.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        arch: ["arm", "x86"]
+        arch: ["arm64", "amd64"]
     permissions:
       contents: read
       packages: write
@@ -33,13 +33,14 @@ jobs:
         env:
           CGO_ENABLED: 0
           GOOS: linux 
-          GOARCH: ${{ matrix.arch == 'arm' && 'aarch64' || 'amd64' }}
+          GOARCH: ${{ matrix.arch }}
         run: go build cmd/service/main.go
       - name: Install cosign
         if: github.event_name != 'pull_request'
         uses: sigstore/cosign-installer@v3
       - name: Setup Docker buildx
         uses: docker/setup-buildx-action@v3
+      - uses: docker/setup-qemu-action@v3
       - name: Log into registry ${{ env.REGISTRY }}
         if: github.event_name != 'pull_request'
         uses: docker/login-action@v3
@@ -60,7 +61,7 @@ jobs:
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
-          platforms: ${{ matrix.arch == 'arm' && 'linux/arm64' || 'linux/amd64' }}
+          platforms:  linux/${{ matrix.arch }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
       - name: Sign the published Docker image