Update .gitlab-ci.yml

.gitlab-ci.yml

@@ -3,7 +3,7 @@
 image: docker:latest
 
 services:
-  - docker:dind
+  - docker:18.09-dind
 
 stages:
   - build
@@ -20,6 +20,8 @@ before_script:
   - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $CI_REGISTRY
 
 build:
+  services:
+   - docker:18.09-dind
   stage: build
   script:
     - docker build -t $IMAGE_TAG ./Docker/