fix(operator): Publish images on docker hub upon release

Author: periklis

.github/workflows/operator-release-please.yml

@@ -17,6 +17,9 @@ jobs:
     outputs:
       release_created: ${{ steps.release.outputs.operator--release_created }}
       release_name: ${{ steps.release.outputs.operator--tag_name }}
+      release_major: ${{ steps.release.outputs.operator--major }}
+      release_minor: ${{ steps.release.outputs.operator--minor }}
+      release_patch: ${{ steps.release.outputs.operator--patch }}
     steps:
       - id: "get_github_app_token"
         name: Get GitHub App Token
@@ -53,4 +56,27 @@ jobs:
           GH_TOKEN: ${{ steps.get_github_app_token.outputs.token }}
         working-directory: "release"
         run: |
-          gh release edit "${{ needs.releasePlease.outputs.release_name }}" --draft=false --latest=false
+          gh release edit "${{ needs.releasePlease.outputs.release_name }}" --draft=false --latest=false
+  publishImages:
+    env:
+      BUILD_TIMEOUT: 60
+      IMAGE_PREFIX: "grafana"
+    needs:
+      - "publishRelease"
+    runs-on: ubuntu-latest
+    steps:
+      - name: "Set up QEMU"
+        uses: "docker/setup-qemu-action@v3"
+      - name: "set up docker buildx"
+        uses: "docker/setup-buildx-action@v3"
+      - name: "Login to DockerHub (from vault)"
+        uses: "grafana/shared-workflows/actions/dockerhub-login@main"
+      - name: "Build and push"
+        timeout-minutes: "${{ env.BUILD_TIMEOUT }}"
+        uses: "docker/build-push-action@v6"
+        with:
+          context: "operator"
+          file: "Dockerfile"
+          platforms: "linux/amd64,linux/arm64,linux/arm"
+          push: true
+          tags: "${{ env.IMAGE_PREFIX }}/loki-operator:${{ steps.releasePlease.outputs.release_major }}.${{ steps.releasePlease.outputs.release_minor }}.${{ steps.releasePlease.outputs.release_patch }}"