Test docker buildx config

.azure-pipelines/templates/integration-jobs.yml

@@ -1,12 +1,15 @@
 jobs:
   - job: build
     pool:
-      vmImage: ubuntu-18.04
+      vmImage: ubuntu-20.04
     steps:
       - script: |
-          docker pull adferrand/backuppc || true
-          docker build --pull --cache-from adferrand/backuppc -t adferrand/backuppc .
-          docker save adferrand/backuppc | gzip -c -1 > $(Build.ArtifactStagingDirectory)/docker-backuppc.tar.gz
+          set -e
+          docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
+          docker buildx create --use
+          VERSION=`cat VERSION`
+          echo "Docker tag is: ${VERSION}"
+          docker buildx build --platform linux/amd64,linux/arm64,linux/arm/v7 --tag adferrand/backuppc --output type=local,dest=test .
         displayName: Build container
       - task: PublishPipelineArtifact@1
         inputs: