Where to set rpc.system and how in node.js tracer.js file

[bshetti]

Hi, while playing with some variants of "hipster" shop, I noticed that the request type comes up unknown. Per the instructions in https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/trace/semantic_conventions/rpc.md#common-attributes
we need to set rpc.system to grpc

Does anyone have examples of how to set this in node.js tracer.js file?
What libraries to add, what is the convention to use this, etc?