Tentative simplification .gitlab-ci.yml

1 job for master in 21 seconds
Status Job ID Name Coverage
  Build
failed #138286
build-image

00:00:21

 
Name Stage Failure
failed
build-image Build

Skipping Git submodules setup
$ docker login -u gitlab-ci-token -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
WARNING! Using --password via the CLI is insecure. Use --password-stdin.
error during connect: Post http://docker:2375/v1.40/auth: dial tcp: lookup docker on 134.158.239.233:53: no such host
Running after script...
$ docker logout $CI_REGISTRY
Not logged in to gitlab-registry.in2p3.fr
ERROR: Job failed: exit code 1