Add workflow for operator latest builds

Author: creydr

.github/workflows/multiarch-build-and-push.yml

@@ -0,0 +1,59 @@
+name: Multiarch Build and Push Image
+
+on:
+  push:
+    branches:
+      - main
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-push:
+    name: Build and Push Multi-Arch Image
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata
+        id: meta
+        run: |
+          GIT_SHA=$(git rev-parse --short HEAD)
+          BUILD_TIMESTAMP=$(date +"%Y%m%d%H%M%S")
+          VERSION_TAG="${GIT_SHA}-${BUILD_TIMESTAMP}"
+
+          echo "git_sha=${GIT_SHA}" >> $GITHUB_OUTPUT
+          echo "build_timestamp=${BUILD_TIMESTAMP}" >> $GITHUB_OUTPUT
+          echo "version_tag=${VERSION_TAG}" >> $GITHUB_OUTPUT
+
+      - name: Build and push image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          target: prod
+          platforms: linux/amd64,linux/arm64,linux/s390x,linux/ppc64le
+          push: true
+          tags: |
+            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
+            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.meta.outputs.version_tag }}