Hello, I have been trying to set up OpenTelemetry instrumentation. I followed the instructions here: https://nextjs.org/docs/app/building-your-application/optimizing/open-telemetry

In particular I created instrumentation.ts in my project root, like this:

$ cat src/instrumentation.ts
import { registerOTel } from '@vercel/otel'

console.log('instrumentation here0')
export function register() {
  console.log('instrumentation here1')
  registerOTel("yourpeer");
}

And I created next.config.js like this:

$ cat next.config.js
/** @type {import('next').NextConfig} */
module.exports = {
  experimental: {
    instrumentationHook: true,
  },
};

I see the following console output when I start the server with "next dev"

  ▲ Next.js 14.2.5
  - Local:        http://localhost:3001
  - Environments: .env.local
  - Experiments (use with caution):
    · instrumentationHook

 ✓ Starting...
 ✓ Ready in 2.4s

But I do not see the following output, which you see when you start the with-opentelemetry-app example:

 ○ Compiling /instrumentation ...
 ✓ Compiled /instrumentation in 853ms (147 modules)

I also do not see the console.log statements I added to instrumentation.ts: instrumentation here0 and instrumentation here1

So it seems like the instrumentationHook is getting installed, but instrumentation.ts is getting ignored. The with-opentelemetry-app example is working fine, but I can't get telemetry enabled in my application. Am I missing something?

I would appreciate any insight anyone could share on this. Thank you.