Update README.md

Version 2.2.1
Bug Fixes:

Fixed issue with Dotenv class not found by including the Composer autoload file.
Resolved SQLSTATE[42S22] error by removing the non-existent relevance column in the ORDER BY clause.
Improvements:

Enhanced fetch_response.php to correctly query available columns and handle search operations.
Improved error handling and added debug points to ingest.php for better diagnostics.
Optimized the script to provide meaningful error messages and trace the execution path.
Features:

Added a file drop area to ingest.php for uploading JSON files with drag-and-drop functionality.
Introduced a spinner to indicate processing status during file uploads.
Implemented a progress bar to show the upload progress visually.
Enhanced user experience by centering the file drop area on the page for better accessibility.
Added detailed debug points in ingest.php to trace the script execution and identify potential issues.
Cosmetic Changes:

Updated the CSS to ensure the file drop area is centered both vertically and horizontally.
Improved the visual styling of the ingest.php page to match the overall design of the application.
Miscellaneous:

Ensured that the AJAX request handling in ingest.php is robust and provides accurate feedback to the user.
Simplified the form data handling and streamlined the file upload process.
Summary
These updates aim to enhance the stability, usability, and visual appeal of the Medical Doctor AI Assistant Bot, providing a smoother and more intuitive experience for users while addressing key bugs and introducing useful features.

README.md

@@ -72,6 +72,35 @@ assets/: Directory containing images and other static assets used in the applica
 
 ## Changelog
 
+### Version 2.0 (2024-05-25)
+Bug Fixes:
+
+Fixed issue with Dotenv class not found by including the Composer autoload file.
+Resolved SQLSTATE[42S22] error by removing the non-existent relevance column in the ORDER BY clause.
+Improvements:
+
+Enhanced fetch_response.php to correctly query available columns and handle search operations.
+Improved error handling and added debug points to ingest.php for better diagnostics.
+Optimized the script to provide meaningful error messages and trace the execution path.
+Features:
+
+Added a file drop area to ingest.php for uploading JSON files with drag-and-drop functionality.
+Introduced a spinner to indicate processing status during file uploads.
+Implemented a progress bar to show the upload progress visually.
+Enhanced user experience by centering the file drop area on the page for better accessibility.
+Added detailed debug points in ingest.php to trace the script execution and identify potential issues.
+Cosmetic Changes:
+
+Updated the CSS to ensure the file drop area is centered both vertically and horizontally.
+Improved the visual styling of the ingest.php page to match the overall design of the application.
+Miscellaneous:
+
+Ensured that the AJAX request handling in ingest.php is robust and provides accurate feedback to the user.
+Simplified the form data handling and streamlined the file upload process.
+Summary
+These updates aim to enhance the stability, usability, and visual appeal of the Medical Doctor AI Assistant Bot, providing a smoother and more intuitive experience for users while addressing key bugs and introducing useful features.
+
+
 ### v1.2 - Feature Update (2024-04-14)
 
 **Key Enhancements:**