Update .gitlab-ci.yml file

.gitlab-ci.yml

-before_script:
-  - python -V  # Print out python version for debugging
-  - pip install virtualenv
-  - virtualenv venv
-  - source venv/bin/activate
-
-
 # run the test suite
 tests:
     stage: test
+    image: registry.gitlab.lis-lab.fr:5005/raphael.sturgis/phd_qarma_searoutes
     only:
         - main
         - develop