Initial commit: OAuth 2.0 인증 시스템 with APISIX API Gateway

- FastAPI 백엔드 + MongoDB + Redis 구성
- React + Vite + TypeScript + shadcn/ui 프론트엔드
- Apache APISIX API Gateway 통합
- Docker Compose 기반 개발 환경
- 3단계 권한 체계 (System Admin, Group Admin, User)
- 동적 테마 지원
- 환경별 설정 (dev/vei/prod)

🤖 Generated with Claude Code

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

oauth/backend/.env.example

@@ -0,0 +1,13 @@
+SECRET_KEY=0198fd96-f538-7a81-be14-d9e4cb81f60d
+MONGODB_URL=mongodb://localhost:27017
+DATABASE_NAME=oauth_db
+REDIS_URL=redis://localhost:6379
+ENVIRONMENT=dev
+BACKUP_PATH=/var/backups/oauth
+ARCHIVE_PATH=/var/archives/oauth
+SMTP_HOST=smtp.gmail.com
+SMTP_PORT=587
+SMTP_USER=your-email@gmail.com
+SMTP_PASSWORD=your-app-password
+NEXUS_URL=http://nexus.local:8081
+NEXUS_REPOSITORY=oauth-artifacts