Project Structure backend 📁 src 📁 main 📁 java 📁 cloudpage 📄 Application.java 📁 config 📄 CorsConfig.java 📄 OpenApiConfig.java 📁 controller 📄 FileController.java 📄 FolderController.java 📁 dto 📄 FileDto.java 📄 FolderDto.java 📁 exceptions 📄 FileDeletionException.java 📄 FileNotFoundException.java 📄 GlobalExceptionHandler.java 📄 InvalidPathException.java 📄 ResourceNotFoundException.java 📄 UnauthorizedAccessException.java 📁 model 📄 User.java 📁 repository 📄 UserRepository.java 📁 security 📄 JwtAuthFilter.java 📄 JwtUtil.java 📄 SecurityConfig.java 📁 service 📄 FileService.java 📄 FolderService.java 📄 UserService.java 📁 test 📁 java 📁 cloudpage 📄 ApplicationTests.java