add redis tests

docker/docker-compose-ci.yml

@@ -6,4 +6,8 @@ services:
       - POSTGRES_USER=${PG_USER}
       - POSTGRES_PASSWORD=${PG_PASS}
     ports:
-      - 5432:5432
+      - 5432:5432
+  redis:
+    image: redis:alpine
+    ports:
+      - 6379:6379