Fix docker images build

.gitlab-ci.yml

@@ -23,6 +23,7 @@ variables:
 
 docker:
   stage: build
+  image: docker.infra.flowdat.com/fd3/sf-php:7.1
   script:
     - docker info
     - docker login -u $DOCKER_USER -p $DOCKER_PWD docker.infra.flowdat.com