Merge branch 'dev' of gitlab.erc.monash.edu.au:hpc-team/strudel2_backend into dev

.gitlab-ci.yml

@@ -4,12 +4,13 @@ stages:
 
 build:
   stage: build
-  image: docker:stable
+  image: docker:18.09
   services:
-    - docker:dind
+    - docker:18.09-dind
   variables:
     DOCKER_HOST: tcp://docker:2375/
     DOCKER_DRIVER: overlay2
+
   script:
     - echo $DOCKERHUBUSER
     - echo $DOCKERHUBPASSWORD