Merge pull request #339 from prgrms-web-devcourse-final-project/fix/kafka

docker: kafka 버전 업

Author: DooHyoJeong

backend/docker-compose.yml

@@ -83,7 +83,7 @@ services:
       retries: 10
 
   zookeeper:
-    image: confluentinc/cp-zookeeper:7.4.4
+    image: confluentinc/cp-zookeeper:7.8.0
     container_name: zookeeper
     restart: unless-stopped
     ports:
@@ -93,7 +93,7 @@ services:
       ZOOKEEPER_TICK_TIME: 2000
 
   kafka:
-    image: confluentinc/cp-kafka:7.4.4
+    image: confluentinc/cp-kafka:7.8.0
     container_name: kafka
     restart: unless-stopped
     depends_on: