Add .gitlab-ci.yml

.gitlab-ci.yml

+image: python:alpine
+
+before_script:
+   - pip install -e .
+   - pip install pylint pycodestyle pydocstyle
+
+pylint:
+ stage: test
+ script: 
+   - pylint pydtn examples
+   
+pycodestyle:
+ stage: test
+ script: 
+   - pycodestyle pydtn examples
+ 
+pydocstyle:
+  stage: test
+  script:
+    - pydocstyle pydtn examples