Renamed API_V1_STR to API_VERSION_STR for consistency. Introduced 'UPLOAD_FOLDER' and ensured its creation, added logging for the data directory path, and implemented allowed image content type validation. Adjusted related references in `main.py`.
Renamed API_V1_STR to API_VERSION_STR for consistency. Introduced 'UPLOAD_FOLDER' and ensured its creation, added logging for the data directory path, and implemented allowed image content type validation. Adjusted related references in `main.py`.