[BUG] On network PermissionDenied errors, hint to the user to check their outgoingDomains manifest field

[filmaj]

Description

If you leave the outgoingDomains field empty in your manifest.ts, but do end up interacting with a third party service on some domain, the error you will see at runtime after you slack run or slack deploy your app will be something like:

error PermissionDenied: Requires net access to "stripe.com", run again with the --allow-net flag
    at opFetch (ext:deno_fetch/26_fetch.js:73:14)
    ..........
  name: "PermissionDenied"
}

Could we catch this error within the runtime, and log out to the check the outgoingDomains field in the app manifest (or even make that check for the user, is that possible? not sure if the runtime has access to the manifest though) as a hint to the user, and then re-raise the error?

EDIT: as pointed out by @mcodik, this should already be happening? See this code.