Update README.md (#12)

Author: liamgriffiths

basics/streaming/typescript/quotes-nextjs/README.md

@@ -1,36 +1,27 @@
-This is a [Next.js](https://nextjs.org/) project bootstrapped with [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app).
+# Simple NextJS Example
 
-## Getting Started
+This project is an example that creates a simple NextJS web app that demonstrates streaming an LLM response from a route handler to a client component.
 
-First, run the development server:
+```sh
+# install the dependencies (substrate)
+npm install
 
-```bash
-npm run dev
-# or
-yarn dev
-# or
-pnpm dev
-# or
-bun dev
-```
-
-Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.
-
-You can start editing the page by modifying `app/page.tsx`. The page auto-updates as you edit the file.
+# set your Substrate API Key
+export SUBSTRATE_API_KEY=<your-api-key>
 
-This project uses [`next/font`](https://nextjs.org/docs/basic-features/font-optimization) to automatically optimize and load Inter, a custom Google Font.
-
-## Learn More
+# run the server
+npm run dev
 
-To learn more about Next.js, take a look at the following resources:
+# view the page
+open http://localhost:3000
+```
 
-- [Next.js Documentation](https://nextjs.org/docs) - learn about Next.js features and API.
-- [Learn Next.js](https://nextjs.org/learn) - an interactive Next.js tutorial.
+## About the project
 
-You can check out [the Next.js GitHub repository](https://github.com/vercel/next.js/) - your feedback and contributions are welcome!
+### `app/quote/route.ts`
 
-## Deploy on Vercel
+This file contains the route handler used to fetch the LLM response from Substrate. We're using the route handler here so that we can produce an event-stream for our client code to consume.
 
-The easiest way to deploy your Next.js app is to use the [Vercel Platform](https://vercel.com/new?utm_medium=default-template&filter=next.js&utm_source=create-next-app&utm_campaign=create-next-app-readme) from the creators of Next.js.
+### `app/Example.tsx`
 
-Check out our [Next.js deployment documentation](https://nextjs.org/docs/deployment) for more details.
+This file contains our client component with a UI for fetching the stream from our route handler and rendering the stream chunks as they arrive.