Serverless Stack

in using the functional approach, this doesn’t seem to work:
```app.stack(WebAppStack, { stackName: 'web-app' });```
it complains about `$stage` not being present. but you can’t just do `'$stage-web-app'` either. the instructions from CDK seem odd :thinking_face: so I assume you just have to do this?
```app.stack(WebAppStack, { stackName: `${app.stage}-web-app` });```

ah, nope. this did the trick:
```app.stack(WebAppStack, { stackName: `${app.stage}-${app.name}-web-app` });```

Oh, didn’t know this would give error :thinking_face:
```app.stack(WebAppStack, { stackName: `${app.stage}-web-app` });```

<@U01JVDKASAC> oh, no error. just not the desired outcome :slightly_smiling_face: