Remove the redis_activity ports listing

It is misleading, it isn't binding to that port

docker-compose.yml

@@ -42,8 +42,6 @@ services:
     image: redis
     command: ["redis-server", "--appendonly", "yes"]
     env_file: .env
-    ports:
-      - 6378:6378
     networks:
       - main
     restart: on-failure