Update .gitlab-ci.yml

1 job for master in 6 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  Test
failed #230648
build

00:00:06

 
Name Stage Failure
failed
build Test
WARNING! Your password will be stored unencrypted in /root/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store

Login Succeeded
$ docker build --pull -t "$CI_REGISTRY_IMAGE" .
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
Cleaning up file based variables
ERROR: Job failed: command terminated with exit code 1