initial commit

.gitignore

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+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+# --- Build outputs ---
+/target/
+/build/
+/out/
+
+# --- Maven ---
+.mvn/wrapper/maven-wrapper.jar
+.mvn/wrapper/maven-wrapper.properties
+.settings/
+
+# --- Gradle ---
+.gradle/
+/gradle/
+/gradlew
+gradlew.bat
+!gradle/wrapper/gradle-wrapper.jar
+
+# --- Logs ---
+*.log
+logs/
+log/
+
+# --- Spring Boot ---
+*.pid
+*.pid.lock
+*.iml
+
+# --- IDE (IntelliJ / Eclipse / STS / VSCode) ---
+.idea/
+*.ipr
+*.iws
+.classpath
+.project
+.factorypath
+.settings/
+.springBeans
+.springdsl
+
+.vscode/
+.history/
+.remote/
+
+# --- OS specific ---
+.DS_Store
+Thumbs.db
+
+# --- Temporary / cache ---
+*.tmp
+*.bak
+*.swp
+*.swo
+*.orig
+.cache/
+tmp/
+bin/
+generated/
+
+# --- Security / credentials (예: 환경변수 파일) ---
+.env
+*.key
+*.pem
+*.p12
+# application-*.yml
+# application-*.properties
+# application.properties
+
+# --- Docker ---
+/docker-compose.override.yml
+
+# --- API Test Tool ---
+api_test_tool/