* **Security Must-Fix:** The MongoDB connection string is dangerously hardcoded in `index.js`; externalize this critical secret immediately. * **Authorization Failure:** Crucial API routes (upload, delete, profile) are unsecured, requiring robust JWT validation middleware for authorization checks. * **Controller Layering:** Avoid nesting file handling (Multer) logic deep inside the controller; treat Multer as dedicated middleware for cleaner separation of concerns. * **API Standardization:** Refactor data fetching endpoints, such as `artworkDetails`, to use standard, cacheable GET requests instead of unconventional POST methods.
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