How to Build a RAG Chatbot for Your Docs with Node.js, Google Gemini, and pgvector
SMRTR summary
Build a RAG-powered PDF chatbot from scratch using Node.js, Express, Google Gemini embeddings, Groq for text generation, and pgvector in Docker , all free, no credit card required. The tutorial walks through both the ingestion pipeline (chunking, embedding, storing vectors) and the query pipeline (semantic search, context assembly, LLM response), with troubleshooting for real errors encountered during development.
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