Update django-ci.yml

.github/workflows/django-ci.yml

@@ -10,6 +10,17 @@ jobs:
   build:
 
     runs-on: ubuntu-latest
+    services:
+      postgres: # we need a postgres docker image to be booted a side car service to run the tests that needs a db
+        image: postgres
+        env: # the environment variable must match with app/settings.py if block of DATBASES variable otherwise test will fail due to connectivity issue.
+          POSTGRES_USER: postgres
+          POSTGRES_PASSWORD: postgres
+          POSTGRES_DB: github-actions
+        ports:
+          - 5432:5432 # exposing 5432 port for application to use
+        # needed because the postgres container does not provide a healthcheck
+        options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
     strategy:
       max-parallel: 4
       matrix: