Pin docker-in-docker to docker:19.03.5-dind
This MR pins the docker-in-docker version to 19.03.5-dind
in order to workaround this issue.
This issue caused a build failure when I attempted to run the build commit stage for klar:
Pulling docker image gitlab/gitlab-runner-helper:x86_64-003fe500 ...
ERROR: Job failed: execution took longer than 1h0m0s seconds
The fix has been tested successfully here