Add Redis service to tests

.github/workflows/build.yaml

@@ -8,6 +8,12 @@ on:
 jobs:
   tests:
     runs-on: ubuntu-latest
+
+    services:
+      redis:
+        image: redis
+        options: --entrypoint redis-server
+
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -24,6 +30,8 @@ jobs:
           pip install coverage coveralls
 
       - name: Run Tests
+        env:
+          REDIS_URL: redis://redis:6379/0
         run: |
           python manage.py collectstatic --noinput
           python manage.py migrate --noinput