L2SS-205: Pull and cache images

.gitlab-ci.yml

@@ -7,6 +7,7 @@ variables:
 cache:
   paths:
     - .cache/pip
+    - /var/lib/docker
 stages:
 #  - building
 #  - linting
@@ -113,4 +114,5 @@ docker_images:
     - touch /root/.Xauthority
 #    Hack BASH_SOURCE into sourced files, docker its sh shell won't set this
     - export BASH_SOURCE=$(pwd)/bootstrap/etc/lofar20rc.sh
-    - docker info
+    - cd docker-compose
+    - make pull