diff --git a/.github/workflows/deploy-dev.yml b/.github/workflows/deploy-dev.yml
index 33c51bb..b10b6bb 100644
--- a/.github/workflows/deploy-dev.yml
+++ b/.github/workflows/deploy-dev.yml
@@ -106,7 +106,7 @@ jobs:
             docker compose -f docker-compose.yml -f docker-compose.dev.yml up -d
 
             echo "⏳ Waiting for health check..."
-            sleep 15
+            sleep 10
 
             echo "🏥 Checking application health..."
             for i in {1..30}; do
@@ -115,10 +115,17 @@ jobs:
                 docker image prune -f
                 exit 0
               fi
+
+              # 5초마다 로그 확인
+              if [ $((i % 5)) -eq 0 ]; then
+                echo "📋 Recent logs (attempt $i/30):"
+                docker compose -f docker-compose.yml -f docker-compose.dev.yml logs --tail=20 widyu-api
+              fi
+
               echo "Waiting for application to be ready... ($i/30)"
               sleep 2
             done
 
-            echo "⚠️  Health check timeout. Checking logs..."
-            docker compose -f docker-compose.yml -f docker-compose.dev.yml logs --tail=50 widyu-api
+            echo "⚠️  Health check timeout. Full logs:"
+            docker compose -f docker-compose.yml -f docker-compose.dev.yml logs --tail=100 widyu-api
             exit 1
diff --git a/docker-compose.dev.yml b/docker-compose.dev.yml
index d1d5e53..c8254c0 100644
--- a/docker-compose.dev.yml
+++ b/docker-compose.dev.yml
@@ -1,8 +1,9 @@
 # Development environment override
 # 사용법: docker compose -f docker-compose.yml -f docker-compose.dev.yml up
+# 개발 환경은 내부 MySQL 컨테이너 사용
 
 services:
-  # MySQL Database (로컬/개발 전용)
+  # MySQL Database (개발 전용)
   mysql:
     image: mysql:8.0
     container_name: widyu-mysql-dev
diff --git a/docker-compose.prod.yml b/docker-compose.prod.yml
index e2679e2..d939e02 100644
--- a/docker-compose.prod.yml
+++ b/docker-compose.prod.yml
@@ -12,7 +12,7 @@ services:
 
       # Database (RDS)
       MYSQL_HOST: ${RDS_ENDPOINT}
-      MYSQL_PORT: ${RDS_PORT:-3306}
+      MYSQL_PORT: ${RDS_PORT}
       MYSQL_USERNAME: ${RDS_USERNAME}
       MYSQL_PASSWORD: ${RDS_PASSWORD}
 
@@ -58,7 +58,7 @@ services:
       --save 300 10
       --save 60 10000
     ports:
-      - "127.0.0.1:${REDIS_PORT:-6379}:6379"  # 내부 접근만
+      - "127.0.0.1:${REDIS_PORT}:6379"  # 내부 접근만
     healthcheck:
       test: ["CMD", "redis-cli", "--no-auth-warning", "-a", "${REDIS_PASSWORD}", "ping"]
     logging: