Add multi arch manifest for ubuntu release images

Author: ig15

.github/workflows/release.yml

@@ -374,3 +374,32 @@ jobs:
             ${{ env.ECR_ACCOUNT_URL }}/${{ env.ECR_RELEASE_FEDORA }}:amd64-${{ github.sha }}
             ${{ env.ECR_ACCOUNT_URL }}/${{ env.ECR_RELEASE_FEDORA }}:amd64-latest
           platforms: linux/amd64
+  create-ubuntu-multiarch-manifest:
+    needs:
+      - build-docker-image-ubuntu-amd64
+      - build-docker-image-ubuntu-arm64
+      - build-docker-image-ubuntu-armv7
+    runs-on: ubuntu-latest
+    permissions:
+      id-token: write
+      contents: read
+    steps:
+      - name: Configure AWS Credentials
+        uses: aws-actions/configure-aws-credentials@v1
+        with:
+          aws-access-key-id: ${{ secrets.ECR_USER_AWS_KEY_ID }}
+          aws-secret-access-key: ${{ secrets.ECR_USER_AWS_KEY_SECRET }}
+          aws-region: us-east-1
+
+      - name: Login to ECR
+        run: aws ecr-public get-login-password --region us-east-1 | docker login --username AWS --password-stdin ${{ env.ECR_ACCOUNT_URL }}
+
+      - name: Create and Push Ubuntu Multi-Arch Manifest
+        run: |
+          docker manifest create ${{ env.ECR_ACCOUNT_URL }}/${{ env.ECR_RELEASE_UBUNTU }}:latest \
+            --amend ${{ env.ECR_ACCOUNT_URL }}/${{ env.ECR_RELEASE_UBUNTU }}:amd64-latest \
+            --amend ${{ env.ECR_ACCOUNT_URL }}/${{ env.ECR_RELEASE_UBUNTU }}:arm64-latest \
+            --amend ${{ env.ECR_ACCOUNT_URL }}/${{ env.ECR_RELEASE_UBUNTU }}:armv7-latest
+
+          docker manifest push ${{ env.ECR_ACCOUNT_URL }}/${{ env.ECR_RELEASE_UBUNTU }}:latest
+