feat: Add database backup system

- Add Dockerfile.backup for backup container
- Add backup.py script with PostgreSQL backup functionality
- Add backup service to docker-compose.prod.yml
- Update env.production.example with backup configuration
- Add db/README.md with backup system documentation

Features:
- Automated daily backups (07:30, 18:00)
- Local and FTP remote backup support
- 7-day retention policy
- PostgreSQL 16 client for waceplm database

env.production.example

@@ -1,15 +1,15 @@
-# PLM ILSHIN 운영환경 설정
+# WACE PLM 운영환경 설정
 
 # 애플리케이션 환경
 NODE_ENV=production
 
 # 데이터베이스 설정
-DB_URL=jdbc:postgresql://localhost:5432/ilshin
+DB_URL=jdbc:postgresql://wace-plm-db:5432/waceplm
 DB_USERNAME=postgres
 DB_PASSWORD=your_production_password
 
 # PostgreSQL 환경 변수
-POSTGRES_DB=ilshin
+POSTGRES_DB=waceplm
 POSTGRES_USER=postgres
 POSTGRES_PASSWORD=your_production_password
 
@@ -26,5 +26,19 @@ DEBUG=false
 SSL_ENABLED=true
 
 # 도메인 설정
-DOMAIN=ilshin.esgrin.com
-ALT_DOMAIN=autoclave.co.kr 
+DOMAIN=waceplm.esgrin.com
+
+# 백업 설정
+POSTGRES_HOST=wace-plm-db
+POSTGRES_DOCKER_PORT=5432
+LOCAL_BACKUP_PATH=/backups/local
+BACKUP_RETENTION_DAYS=7
+BACKUP_TIME_AM=07:30
+BACKUP_TIME_PM=18:00
+
+# FTP 백업 설정 (NAS Backup SMB Configuration)
+FTP_HOST=effectsno1.synology.me
+FTP_USER=esgrin-mes-backup
+FTP_PASSWORD=UyD12#11YHnn
+FTP_PATH=esgrin-mes-backup
+FTP_PORT=2112