Update .gitlab-ci.yml file to use coverage

.gitlab-ci.yml

@@ -1,3 +1,6 @@
+# requires up-to-date conda environment to run the tests as 
+# the gitlab runner does not have access to /sf...
+
 build-job:
   stage: build
   script:
@@ -11,5 +14,7 @@ run_tests:
         - echo `pwd`
         - pip install -e .
     script:
-        - echo "Hello, $GITLAB_USER_LOGIN!"
-        - pytest -v
+        - echo "Starting pytest run"
+        - coverage run -m pytest
+        - coverage report
+    coverage: '/TOTAL.*\s+(\d+\%)/'