"Updated import statements to use `langchain_community` instead of `langchain` for `llms` and `document_loaders` modules."

"Updated Dockerfile to install langchain-community and modified src/helper.py to import from langchain_core, langchain_community, and langchain_huggingface"

"Updated .env file with new API tokens, refactored app.py to include CORS, added question suggestion feature, and modified templates/chat.html with new styles and layout."

first commit