Merge branch 'renovate/docker-docker-19.x' into 'main'

chore(deps): update docker docker tag to v19.03.12

See merge request kotahi/kotahi!38

.gitlab-ci.yml

@@ -11,9 +11,9 @@ stages:
   # - demo
 
 build:
-  image: docker:19.03.1
+  image: docker:19.03.12
   services:
-    - docker:19.03.1-dind
+    - docker:19.03.12-dind
   stage: build
   script:
     - docker version