google-gemini/gemini-fullstack-langgraph-quickstart ? reverse-engineered prompt

Build me a simple fullstack web app where I can ask a question in a chat style interface and get a researched answer back with citations.

I want the app to look clean and modern, and have a React frontend with a backend agent that can search the web, think about what it still needs to know, then search again if needed before giving a final answer. The replies should feel like they were written by a smart research assistant, not just a generic chatbot.

Please make it work locally with a single command for development, and also make it easy to run with Docker for production. Use Gemini on the backend for the reasoning and answer writing, and make sure the app clearly shows the sources it used. If you need current setup details, look up the latest docs online and wire it up in a practical way.