docs: Add server infrastructure summary to CLAUDE.md

- Add server roles (Server1: Master, Server2/3: Workers)
- Add nginx-proxy-manager info (port 81, SSL management)
- Add registered domains table
- Add database info (autonet, autonet_staging)
- Link to SERVER_INFRASTRUCTURE_PLAN.md for details

This ensures infrastructure context is always available in sessions.

CLAUDE.md

@@ -8,6 +8,42 @@
 
 ---
 
+# 🖥️ 서버 인프라 요약
+
+## 서버 구성
+
+| 서버 | IP | 역할 | 주요 서비스 |
+|------|-----|------|-------------|
+| **Server1** | 192.168.0.201 | Master | nginx-proxy-manager, PostgreSQL, Redis, Portainer, Grafana |
+| **Server2** | 192.168.0.202 | Worker | AutonetSellCar (Production/Staging) |
+| **Server3** | 192.168.0.203 | Worker | Grantech, Nextcloud (cloud.grantech.kr) |
+
+## 리버스 프록시 (nginx-proxy-manager)
+
+- **관리 UI**: http://server1:81 (또는 http://192.168.0.201:81)
+- **모든 도메인 SSL 인증서**는 nginx-proxy-manager에서 관리
+- **새 도메인 추가 시** → nginx-proxy-manager에서 Proxy Host 추가
+
+### 등록된 도메인
+
+| 도메인 | Forward Host | Forward Port |
+|--------|--------------|--------------|
+| autonetsellcar.com | 192.168.0.202 | 3000 |
+| staging.autonetsellcar.com | 192.168.0.202 | 3001 |
+| grantech.kr | 192.168.0.203 | 3001 |
+| cloud.grantech.kr | 192.168.0.203 | 8080 |
+
+## 데이터베이스
+
+| DB 이름 | 용도 | 서버 |
+|---------|------|------|
+| `autonet` | AutonetSellCar Production | Server1 (PostgreSQL) |
+| `autonet_staging` | AutonetSellCar Staging | Server1 (PostgreSQL) |
+
+> **상세 인프라 문서**: [SERVER_INFRASTRUCTURE_PLAN.md](./SERVER_INFRASTRUCTURE_PLAN.md)
+
+---
+
 # ⛔ CRITICAL: 배포 전 필수 확인사항 (DO NOT SKIP!)
 
 ## 🚨 Production 환경 고정값 (절대 변경 금지!)