···11-# TODO
22-33-## High Priority
44-55-- [x] **Separate Test UI and Admin UI Controls**: There should be a way to disable the test UI without also disabling the admin UI
66- - Add `USE_TEST_UI` environment variable to control access to `/index.html` test interface
77- - Keep `USE_PUBLIC_FOLDER` for admin UI but add conditional routing for test interface
88- - This would allow production deployments to disable testing while keeping admin functionality
99-1010-- [x] _(Removed in favor of NGINX)_ ~~**Fix SSL/HTTPS Implementation**: The previous SSL implementation was incomplete and non-functional~~
1111- - The SSL certificate and key were read but not actually used to create an HTTPS server
1212- - Needed to implement proper HTTPS server with Express.js or migrate to native Deno HTTPS
1313- - Needed to add proper SSL error handling and validation
1414-1515-## Medium Priority
1616-1717-- [x] **Environment Configuration Management**
1818- - Create a `.env.example` file with all available environment variables
1919- - Add environment variable validation on startup
2020- - Document all configuration options in README.md
2121-2222-- [x] **API Security Improvements**
2323- - Implement API key authentication for programmatic access
2424- - Add request size limits for file uploads
2525- - Consider adding CSRF protection for admin endpoints
2626- - Add rate limiting for API endpoints (especially `/api/levels` POST)
2727-2828-- [ ] **Database Improvements**
2929- - Add database migrations system for schema changes
3030- - Implement database connection pooling
3131- - Add database backup/restore functionality
3232- - Add indexes for better query performance (author, created_at, etc.)
3333-3434-- [ ] **Error Handling & Logging**
3535- - Implement structured logging (JSON format)
3636- - Add error tracking/monitoring integration
3737- - Improve error messages for better debugging
3838- - Add request/response logging middleware
3939-4040-## Low Priority
4141-4242-- [x] **Code Quality & Maintenance**
4343- - Split main.ts into separate modules (routes, middleware, database, etc.)
4444- - Add TypeScript strict mode configuration
4545- - Implement unit tests for core functionality
4646- - _(Decided against: API should not be public. README.md has instructions for the API.)_ ~~Add API documentation (OpenAPI/Swagger)~~
4747-4848-- [ ] **Feature Enhancements**
4949- - Add level search by tags/categories
5050- - Implement level comments/reviews system
5151- - Add user profiles and level collections
5252- - Add level statistics and analytics dashboard
5353-5454-- [ ] **Performance Optimizations**
5555- - Implement response caching for level listings
5656- - Add CDN support for static files
5757- - Optimize database queries with prepared statements
5858- - Add pagination limits and validation
5959-6060-- [ ] **Deployment & DevOps**
6161- - Add Docker containerization
6262- - Create deployment scripts
6363- - Add health check endpoint (`/api/health`)
6464- - Implement graceful shutdown handling