Add a readme

.env.example

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+OPENAI_API_KEY=XXXXXXXX
+NEXTAUTH_SECRET=XXXXXXXX

README.md

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 # Next.js AI Chatbot
 
-A an AI-powered Chatbot built with Next.js built by Vercel Labs.
+A Next.js 13 and App Router-ready AI chatbot template featuring:
+
+- [Next.js](https://nextjs.org) App Router
+- React Server Components (RSCs), Suspense, and Server Actions
+- [Vercel AI SDK](https://sdk.vercel.ai/docs) for streaming chat UI
+- Support for OpenAI (default), Anthropic, HuggingFace, or custom AI chat models and/or LangChain
+- Edge runtime-ready
+- [Shadcn UI](https://ui.shadcn.com)
+  - Styling with [Tailwind CSS](https://tailwindcss.com)
+  - [Radix UI](https://radix-ui.com) for headless component primitives
+- Chat History, rate limiting, and session storage with [Vercel KV](https://vercel.com/storage/kv)
+- [Next Auth](https://github.com/nextauthjs/next-auth) for authentication
+
+## Model Providers
+
+This template ships with OpenAI `gpt-3.5-turbo` as the default. However, thanks to the [Vercel AI SDK](https://sdk.vercel.ai/docs), switching LLM providers to [Anthropic](https://anthropic.com), [HuggingFace](https://huggingface.co), or using [LangChain](https://js.langchain.com) with just a few lines of code.
+
+## Running locally
+
+You will need to use the environment variables [defined in `.env.example`](.env.example) to run Next.js AI Chatbot. It's recommended you use [Vercel Environment Variables](https://vercel.com/docs/concepts/projects/environment-variables) for this, but a `.env` file is all that is necessary.
+
+> Note: You should not commit your `.env` file or it will expose secrets that will allow others to control access to your various OpenAI and authentication provider accounts.
+
+1. Install Vercel CLI: `npm i -g vercel`
+2. Link local instance with Vercel and GitHub accounts (creates `.vercel` directory): `vercel link`
+3. Download your environment variables: `vercel env pull`
+
+```bash
+pnpm install
+pnpm dev
+```
+
+Your app should now be running on [localhost:3000](http://localhost:3000/).
+
+## Authors
+
+This library is created by [Vercel](https://vercel.com) and [Next.js](https://nextjs.org) team members, with contributions from:
+
+- Jared Palmer ([@jaredpalmer](https://twitter.com/jaredpalmer)) - [Vercel](https://vercel.com)
+- Shu Ding ([@shuding\_](https://twitter.com/shuding_)) - [Vercel](https://vercel.com)
+- Shadcn ([@shadcn](https://twitter.com/shadcn)) - [Contractor](https://shadcn.com)
+
+[Contributors](https://github.com/vercel-labs/ai-chatbot/graphs/contributors)