Arcjet Rate Limit with Next.js using the App Router

This example shows how to use Arcjet with a Next.js route handler.

How to use

From the root of the project, install the SDK dependencies.
```
npm ci
```
Enter this directory and install the example's dependencies.
```
cd examples/nextjs-app-dir-rate-limit
npm ci
```
Rename .env.local.example to .env.local and add your Arcjet key.
Start the dev server.
```
npm run dev
```
Visit http://localhost:3000/api/arcjet.
Refresh the page to trigger the rate limit.