[#67] feat: app과 모니터링 컨테이너들을 동일 network로 그룹화

Author: hyh1016

docker-compose-deploy.yml

@@ -45,3 +45,4 @@ volumes:
 networks:
   gamchi-network:
     driver: bridge
+    name: gamchi-network

monitoring/docker-compose.yml

@@ -32,4 +32,4 @@ services:
 
 networks:
   gamchi-network:
-    driver: bridge
+    external: true

monitoring/prometheus/prometheus.yml

@@ -10,7 +10,7 @@ scrape_configs:
     metrics_path: '/actuator/prometheus'
     scrape_interval: 15s
     static_configs:
-      - targets: ['app:8080']
+      - targets: ['gamchi-app:8080']
     metric_relabel_configs:
       - source_labels: [uri]
         regex: "/actuator.*"