fix: API 프록시 포트를 8000으로 수정

- /api/ 경로를 localhost:18000 → localhost:8000으로 변경
- frontend 백엔드 실제 포트에 맞춰 nginx 설정 수정
- README.md 프록시 라우팅 정보 업데이트

🤖 Generated with [Claude Code](https://claude.ai/code)

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

README.md

@@ -40,7 +40,7 @@ NAS_SSH_KEY_ADMIN: SSH 개인키
 ## 프록시 라우팅
 
 - `https://ro-being.com/` → 192.168.219.45:5173 (메인 프론트엔드)
-- `https://ro-being.com/api/` → 192.168.219.45:18000 (frontend/backend)
+- `https://ro-being.com/api/` → 192.168.219.45:8000 (frontend/backend)
 - `https://ro-being.com/rb8001/` → 192.168.219.45:8001 (api_base)
 
 ## SSL 설정

server-nginx-default

@@ -130,7 +130,7 @@ server {
 
         # API endpoints
         location /api/ {
-            proxy_pass http://localhost:18000;
+            proxy_pass http://localhost:8000;
             proxy_set_header Host $host;
             proxy_set_header X-Real-IP $remote_addr;
             proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;