feat: Add github actions for django tests

.github/workflows/django_tests.yml

@@ -0,0 +1,25 @@
+name: django-tests
+on:
+    pull_request:
+        types: [opened, synchronize]
+jobs:
+    run-tests:
+        runs-on: ubuntu-latest
+        env:
+            POSTGRES_DB: test_cantusdb
+            POSTGRES_USER: test_user
+            POSTGRES_HOST: postgres
+            POSTGRES_PORT: 5432
+            PROJECT_ENVIRONMENT: PRODUCTION
+            CANTUSDB_STATIC_ROOT: /some/path
+            CANTUSDB_MEDIA_ROOT: /some/path
+            CANTUSDB_HOST: somehost
+            CANTUSDB_SECRET_KEY: "hereisakey1234"
+            POSTGRES_PASSWORD: woahagreatpasswordabc
+            AWS_EMAIL_HOST_USER: test_user
+            AWS_EMAIL_HOST_PASSWORD: test_password
+        steps:
+            - uses: actions/checkout@v3
+            - run: docker compose -f docker-compose-development.yml build
+            - run: docker compose -f docker-compose-development.yml up -d
+            - run: docker compose -f docker-compose-development.yml exec -T django python manage.py test main_app.tests