Updated code with greeting support

Update date and time to UTC format

Updating chroma db to be singleton class

Fix upload path to be part of environment vairiable

Fix upload path to be part of environment vairiable

Sorted the documents list in descending order

Log google drive documents in the mongodb, add source of the document and made chunks to overlap text.

Updated with port and issue fixed

Commiting code

changed the bart model from large to base

Updated embedding to produciton, changed the depenedency for magic library

Update deployment constraints for python-magic-bin

Updarte chatbot with deployment configurations on the Render

DOne some testing and fixed the retrieving context by date.

Changes to be committed:

Implementation for Google drive is done. Now it is working fine, except need a new function that can delete the chunks if a document is removed from google drive.

Enhanced the support for the excel file and added endpoint to have optimized vector store and Rag for the Excel.

Working chat with context and history

Setup completed

Commit chatbot chnages

Updated Knowledge base with Upload, get and delete endpoints

Refactoring code

Added support for multiple LLMs

initial commit