Add docker manifest creation in the workflow (#4527)

.github/workflows/docker.yml

@@ -64,12 +64,42 @@ jobs:
           TAG_ARCH="$TAG-${{ matrix.runner_arch.arch }}"          
           docker push grafana/${{ matrix.component }}:$TAG_ARCH
 
+  manifest:
+    if: github.repository == 'grafana/tempo'
+    needs: ['get-tag', 'docker']
+    strategy:
+      matrix:
+        component: [ tempo, tempo-vulture, tempo-query, tempo-cli ]
+    runs-on: ubuntu-24.04
+    env:
+      TAG: ${{ needs.get-tag.outputs.tag }}
+      IMAGE_NAME: grafana/${{ matrix.component }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Login to DockerHub
+        uses: grafana/shared-workflows/actions/dockerhub-login@dockerhub-login-v1.0.0
+
+      - name: docker-manifest-create-and-push
+        run: |
+          docker manifest create \
+          	$IMAGE_NAME:$TAG               \
+          	--amend $IMAGE_NAME:$TAG-amd64  \
+          	--amend $IMAGE_NAME:$TAG-arm64
+          docker manifest push $IMAGE_NAME:$TAG
+
+          docker manifest create \
+          	$IMAGE_NAME:latest            \
+          	--amend $IMAGE_NAME:$TAG-amd64   \
+          	--amend $IMAGE_NAME:$TAG-arm64
+          docker manifest push $IMAGE_NAME:latest
 
   cd-to-dev-env:
     # This job deploys the latest main commit to the dev environment
     if: github.repository == 'grafana/tempo' && github.ref == 'refs/heads/main'
     runs-on: ubuntu-24.04
-    needs: docker
+    needs: manifest
     steps:
       - name: Checkout
         uses: actions/checkout@v4