add .gitlab-ci.yml
Run tests using GitLab CI.
To be able to run the tests, the following modifications should be done on the repo before merge:
- In the Settings -> General menu expand "Visibility, project features, permissions"
- Enable "Pipelines" under "Repository" section
Then CI/CD will appear under Settings. Then:
- In the Settings -> CI/CD menu expand "Runners"
- Under heading "Available specific runners", enable runner "INRIA QLF-CI dev (1 CPU, 2 GB RAM) " (should be the first one in the list)