Is there an enable flag that can be used inside Nextjs config?

Something similar to @next/bundle-analyzer [enabled flag](https://www.npmjs.com/package/@next/bundle-analyzer#usage-with-environment-variables).

For Nextjs, I imagine it would look something like this:

```
const envyConfig = {
serviceName: 'next-app',
enabled: process.env.ENVY === 'true'
};
```

Currently I'm doing something like this to avoid my logs to be filled with an infinite stream of envy errors if the webui is not running alongside:

```
module.exports = process.env.ENVY === 'true'
? withEnvy(nextConfig, envyConfig)
: nextConfig;
```

and my script to run dev wtih envy looks like this:

```
"dev": "next dev",
"dev:envy": "npx concurrently \"npx @envyjs/webui\" \"ENVY=true npm run dev\"",
```

Or is there another recommended approach to this?

Awesome project btw!