compose 네트워크 이름을 app-network로 통일

다른 스택(adform, innertab)과 동일한 명명 규칙 적용

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docker-compose.yml

@@ -12,7 +12,7 @@ services:
     volumes:
       - postgres-data:/var/lib/postgresql/data
     networks:
-      - report-network
+      - app-network
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -U ${DB_USER:-postgres} -d ${DB_NAME:-report_db}"]
       interval: 5s
@@ -43,7 +43,7 @@ services:
     volumes:
       - ./backend/img:/app/img
     networks:
-      - report-network
+      - app-network
 
   frontend:
     build: ./frontend
@@ -54,10 +54,10 @@ services:
     depends_on:
       - backend
     networks:
-      - report-network
+      - app-network
 
 networks:
-  report-network:
+  app-network:
     driver: bridge
 
 volumes: