Add variable for redis password

docker-compose.yml

@@ -14,8 +14,6 @@ services:
     restart: always
     volumes:
       - /opt/appdata/nextcloud/mysql:/var/lib/mysql
-    environment:
-      - MYSQL_ROOT_PASSWORD=nextcloud
     env_file:
       - db.env
     container_name: nextcloud-db
@@ -25,6 +23,7 @@ services:
   redis:
     image: redis:alpine
     container_name: nextcloud-redis
+    command: redis-server --requirepass ${REDIS_PASSWORD}
     networks:
       - backend-nextcloud
     restart: always