Elastic APM tracing support

[majusko]

Hi guys,

I created a simple Spring Boot Starter project implementing the Elastic APM tracing support. I'm extending this library developed by LogNet as I really love your project and don't have a need to create a new wheel.

Library link: https://github.com/majusko/grpc-apm-spring-boot-starter

Simple implementation using global interceptors (https://github.com/majusko/grpc-example)

Already using it in few production projects so the library will be definitely supported and I'm also open to contribution.

Would you consider mentioning this library in README? I'm open to a discussion if you like the library but imagine some other way of cooperation.

Mario