CI: add coverage report

Signed-off-by: Skia <skia@libskia.so>

.coveragerc

@@ -0,0 +1,14 @@
+[run]
+source = .
+branch = False
+omit =
+    *test*
+    */migrations/*
+    doc/*
+    env/*
+[report]
+show_missing = False
+include = *.py
+[html]
+title = Sith Code Coverage
+directory = coverage_report

.gitlab-ci.yml

@@ -3,5 +3,11 @@ test:
   - apt-get update
   - apt-get install -y gettext
   - pip install -r requirements.txt
-  - python manage.py compilemessages
-  - python manage.py test
+  - pip install coverage
+  - ./manage.py compilemessages
+  - coverage run ./manage.py test
+  - coverage html
+  - coverage report
+  artifacts:
+    paths:
+      - coverage_report/

README.md

@@ -1,3 +1,6 @@
+[![pipeline status](https://ae-dev.utbm.fr/ae/Sith/badges/master/pipeline.svg)](https://ae-dev.utbm.fr/ae/Sith/commits/master)
+[![coverage report](https://ae-dev.utbm.fr/ae/Sith/badges/master/coverage.svg)](https://ae-dev.utbm.fr/ae/Sith/commits/master)
+
 ## Sith AE
 
 ### Get started