Deploying to server error: Missing download-assets.js

Hello,

When I take the vanilla example and try deploying to Netlify I get the following:

```
7:21:38 PM: Error: Cannot find module '/opt/scripts/download-assets.js'
7:21:38 PM: at Module._resolveFilename (node:internal/modules/cjs/loader:1140:15)
7:21:38 PM: at Module._load (node:internal/modules/cjs/loader:981:27)
7:21:38 PM: at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:128:12)
7:21:38 PM: at node:internal/main/run_main_module:28:49 {
7:21:38 PM: code: 'MODULE_NOT_FOUND',
```

I was under the impression I could take the "vanilla-app" example and deploy that, but it seems it's trying to reference files in the rest of repository, outside all of the app examples. As such is there any guidance on how I should be deploying the examples, or even if that is a bug?