Replace Console with bunyan logger in Sample App

[liustve]

Description of changes:
There are currently no OTel supported logs being emitted from the sample-app.

Replaces sample-app logging with bunyan in order for OpenTelemetry to auto-instrument the logging library from the app.

/aws-sdk-s3:

{"name":"express-app","hostname":"ip-172-31-7-29.us-west-2.compute.internal","pid":2522078,"level":30,"msg":"done aws sdk s3 request","time":"2025-05-28T17:52:53.115Z","v":0}
{"name":"express-app","hostname":"ip-172-31-7-29.us-west-2.compute.internal","pid":2522078,"level":50,"msg":"Exception thrown: Invalid value \"undefined\" for header \"X-Amzn-Trace-Id\"","time":"2025-05-28T17:52:54.132Z","v":0}

/http:

{"name":"express-app","hostname":"ip-172-31-7-29.us-west-2.compute.internal","pid":2522078,"level":30,"msg":"random value from http request: [94]\n","time":"2025-05-28T17:54:09.786Z","v":0}

/rolldice:

{"name":"express-app","hostname":"ip-172-31-7-29.us-west-2.compute.internal","pid":2522987,"level":30,"msg":"rolldice: 1","time":"2025-05-28T17:54:52.830Z","v":0}

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