feat: Add documentation for API endpoints and directory structure

documents/en/directory-structure.md

@@ -0,0 +1,32 @@
+# Directory Structure
+
+```
+mytube/
+├── backend/             # Express.js backend (TypeScript)
+│   ├── src/             # Source code
+│   │   ├── config/      # Configuration files
+│   │   ├── controllers/ # Route controllers
+│   │   ├── db/          # Database migrations and setup
+│   │   ├── routes/      # API routes
+│   │   ├── services/    # Business logic services
+│   │   ├── utils/       # Utility functions
+│   │   └── server.ts    # Main server file
+│   ├── uploads/         # Uploaded files directory
+│   │   ├── videos/      # Downloaded videos
+│   │   └── images/      # Downloaded thumbnails
+│   └── package.json     # Backend dependencies
+├── frontend/            # React.js frontend (Vite + TypeScript)
+│   ├── src/             # Source code
+│   │   ├── assets/      # Images and styles
+│   │   ├── components/  # React components
+│   │   ├── contexts/    # React contexts
+│   │   ├── pages/       # Page components
+│   │   ├── utils/       # Utilities and locales
+│   │   └── theme.ts     # Theme configuration
+│   └── package.json     # Frontend dependencies
+├── build-and-push.sh    # Docker build script
+├── docker-compose.yml   # Docker Compose configuration
+├── DEPLOYMENT.md        # Deployment guide
+├── CONTRIBUTING.md      # Contributing guidelines
+└── package.json         # Root package.json for running both apps
+```