update pipeline to use coverage.py and new settings

.github/workflows/django.yml

@@ -41,4 +41,6 @@ jobs:
 
       - name: Run Tests
         run: |
-          python manage.py test
+          coverage run --source='.' manage.py test --settings settings.ci
+          coverage report
+          coverage xml

treexpert/settings/ci.py

@@ -0,0 +1,12 @@
+from .base import *
+
+DATABASES = {
+    "default": {
+        "ENGINE": "django.db.backends.postgresql",
+        "NAME": "ci",
+        "USER": "postgres",
+        "PASSWORD": "postgres",
+        "HOST": "postgres",
+        "PORT": "5432",
+    },
+}