Update .gitlab-ci.yml

.gitlab-ci.yml

@@ -1,3 +1,18 @@
+image: docker:stable
+
+services:
+  - docker:dind
+
+variables:
+  CONTAINER_IMAGE: docker.infra.flowdat.com/fd3/sf-php
+  DOCKER_USER: drone
+  DOCKER_PWD: 6hd2dLfL
+  DOCKER_HOST: tcp://docker:2375
+  DOCKER_DRIVER: overlay2
+  
+before_script:
+  - docker login -u $DOCKER_USER -p $DOCKER_PWD docker.infra.flowdat.com
+
 build_branch:
   image: docker.infra.flowdat.com/fd3/sf-php:latest
   script:
@@ -11,14 +26,6 @@ build_branch:
     - pushes
     - branches
 
-variables:
-  CONTAINER_IMAGE: docker.infra.flowdat.com/fd3/sf-php
-  DOCKER_USER: drone
-  DOCKER_PWD: 6hd2dLfL
-  
-before_script:
-  - docker login -u $DOCKER_USER -p $DOCKER_PWD docker.infra.flowdat.com
-
 docker_php_sf_70:
   stage: build
   script: