* Add documentation for tracing directive
* Update header in tracing.md
Co-authored-by: Matt Holt <mholt@users.noreply.github.com>
* Update documentation in tracing.md
Co-authored-by: Matt Holt <mholt@users.noreply.github.com>
* add link to the repository
* add link to gRPC repo and w3c specification
Co-authored-by: Andrii Kushch <>
Co-authored-by: Matt Holt <mholt@users.noreply.github.com>