RAG knowledge base Q&A system built with FastAPI + React + LangChain + ChromaDB + Ollama.

Upload PDF/Word/Markdown/TXT documents and ask questions against them.

docker compose up -d
docker compose exec ollama ollama pull deepseek-r1:8b
docker compose exec ollama ollama pull nomic-embed-text

Open http://localhost:3000

• Backend: FastAPI, LangChain, Python 3.11
• Frontend: React 18, TypeScript, Ant Design
• Vector DB: ChromaDB
• LLM: Ollama (switchable to OpenAI/Claude)
• Deployment: Docker Compose

# Backend
cd backend
pip install -r requirements.txt
uvicorn main:app --reload --port 8000

# Frontend
cd frontend
npm install
npm start