Add tag

.gitlab-ci.yml

@@ -30,12 +30,16 @@ before_script:
   - source venv/bin/activate
 
 test:
+  tags: 
+  - env:docker
   script:
     - python setup.py test
     - pip install tox flake8  # you can also use tox
     - tox -e py36,flake8
 
 run:
+  tags: 
+  - env:docker
   script:
     - python trial_json.py
     # an alternative approach is to install and run:
@@ -46,6 +50,8 @@ run:
 #      - dist/*.whl
 
 pages:
+  tags: 
+  - env:docker
   script:
     - pip install sphinx sphinx-rtd-theme
     - cd doc