Update .gitlab-ci.yml

.gitlab-ci.yml

@@ -1,4 +1,3 @@
-image: node:8.11.4
 stages:
   - setup
   - build
@@ -6,6 +5,7 @@ stages:
   - cleanup
 
 setup:
+  image: node:8.11.4
   only: master
   tag: prod
   script:
@@ -20,6 +20,7 @@ setup:
     - npm install --save
 
 build:
+  image: node:8.11.4
   stage: build
   only: master
   tag: prod
@@ -27,6 +28,7 @@ build:
     - npm run build
 
 deploy:
+  image: node:8.11.4
   stage: deploy
   only: master
   tag: prod
@@ -39,6 +41,7 @@ deploy:
     url: https://wbm.lucajaents.ch
 
 cleanup:
+  image: node:8.11.4 
   tag: prod
   stage: cleanup
   script: