pipe fix

.gitlab-ci.yml

@@ -38,6 +38,7 @@ test-frontend:
 build-backend:
   stage: build
   image: docker:latest
+  privileged: true
   variables:
     DOCKER_TLS_CERTDIR: ""
     DOCKER_HOST: tcp://docker:2375
@@ -45,7 +46,6 @@ build-backend:
     - name: docker:dind
       alias: docker
       command: ["--tls=false"]
-      privileged: true
   before_script:
     - sleep 5
     - docker info