Support capturing HTTP request/response headers via environment variables in Node.js auto-instrumentation

[Abhijeetpradhan]

Issue:
Currently, in Node.js auto-instrumentation, capturing request or response headers requires code-level hooks (e.g., requestHook/responseHook). There is no support for configuring this via environment variables.

In contrast, the Java agent supports header capture through env vars like OTEL_INSTRUMENTATION_HTTP_SERVER_CAPTURE_REQUEST_HEADERS

Is there any similar support of capturing request and response headers or if not would it be possible to add similar support to the Node.js auto-instrumentation, to allow declarative configuration via environment variables?

Dependencies used:
{
"@opentelemetry/api": "^1.9.0",
"@opentelemetry/auto-instrumentations-node": "^0.60.1",
"@opentelemetry/exporter-trace-otlp-proto": "^0.202.0",
"@opentelemetry/sdk-metrics": "^2.0.1",
"@opentelemetry/sdk-node": "^0.202.0",
"@opentelemetry/sdk-trace-base": "^2.0.1"
}
Node.js version: node v16.20.2 and above

Thanks for your consideration!