Initial commit: IT센터 출입자관리시스템 (ACS)

방문자 사전신청·승인, 입·출입 체크인/아웃, QR 배지, 재실현황,
블랙리스트, 대시보드 통계, 방문 리포트(엑셀)까지 7단계 전 기능 구현.

- backend: Spring Boot 3.4.5 / Java 21 (JDK 26 빌드), 세션 인증, JPA, H2/PostgreSQL, POI, ZXing, Flyway
- frontend: React 19 / Vite 6 / TypeScript
- infra: Docker Compose (db·app·web nginx), Flyway V1__init, Python 사용자 시드
- docs: 워크플로우 / 시퀀스 다이어그램(Mermaid) / 이슈·유의사항

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

backend/src/main/resources/application.properties

@@ -0,0 +1,40 @@
+spring.application.name=acs
+server.port=8080
+
+# ===== Logging =====
+logging.level.root=INFO
+logging.level.com.itcenter.acs=DEBUG
+
+# ===== H2 in-memory (local dev, default) =====
+spring.datasource.url=jdbc:h2:mem:acsdb;DB_CLOSE_DELAY=-1;MODE=PostgreSQL
+spring.datasource.driver-class-name=org.h2.Driver
+spring.datasource.username=sa
+spring.datasource.password=
+
+# ===== JPA / Hibernate =====
+spring.jpa.hibernate.ddl-auto=update
+spring.jpa.show-sql=false
+spring.jpa.open-in-view=false
+spring.jpa.properties.hibernate.format_sql=false
+
+# H2 console (dev only): http://localhost:8080/h2-console  (JDBC URL above)
+spring.h2.console.enabled=true
+
+# Flyway is for the prod (PostgreSQL) profile; schema in dev comes from ddl-auto
+spring.flyway.enabled=false
+
+# Multipart (Excel upload)
+spring.servlet.multipart.max-file-size=10MB
+spring.servlet.multipart.max-request-size=10MB
+
+# ===== SMS/LMS pass delivery =====
+# provider=dev  -> LoggingPassNotifier: logs + writes QR to outbox-dir (no network)
+# provider=hanbank -> HanbankMessagePassNotifier: sends an LMS with the public
+#   pass link via the in-house DMZ message API (requires network reachability).
+acs.sms.provider=dev
+acs.sms.outbox-dir=./sms-outbox
+acs.sms.api-url=http://210.104.132.59:8000
+# Base URL the SMS link points to (the visitor's public pass page).
+acs.public-base-url=http://localhost:5173
+
+spring.profiles.active=local