Dev > Main 브랜치 병합

1. CI/CD 포트 종료 코드를 수정했습니다.

Author: NamDoHyeon2

.github/workflows/backend-cd.yml

@@ -29,6 +29,12 @@ jobs:
             git pull origin main
             chmod +x ./gradlew
             ./gradlew build
+
+            pid=$(lsof -ti:8080)
+            if [ -n "$pid" ]; then
+              kill -9 $pid
+            fi
+
             docker stop devpals-container || true
             docker rm devpals-container || true
             docker build -t devpals-app .