Debug local build script - start.ps1

Get the following error when running locally with the start.ps1 script:
```
Start-Process: \voice_agent\app\start.ps1:72:17
Line |
  72 |  … ntendProc = Start-Process -FilePath "npm" -ArgumentList @("run", "dev …
     |                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     | This command cannot be run due to the error: %1 is not a valid Win32 application.
```