Add link for joining CNCF Slack

README.md

@@ -1,7 +1,7 @@
 <img align="right" width="290" height="290" src="https://www.jaegertracing.io/img/jaeger-vector.svg">
 
 
-[![Slack chat][slack-img]][slack]
+[![Slack chat][slack-img]](#get-in-touch)
 [![Project+Community stats][community-badge]][community-stats]
 [![OpenTracing-1.0][ot-badge]](https://opentracing.io)
 [![Mentioned in Awesome Go](https://awesome.re/mentioned-badge-flat.svg)](https://github.com/avelino/awesome-go#performance)
@@ -164,13 +164,13 @@ The Jaeger contributors meet bi-weekly, and everyone is welcome to join.
 
 See https://www.jaegertracing.io/docs/roadmap/
 
-## Questions, Discussions, Bug Reports
+## Get in Touch
 
-Reach project contributors via these channels:
+Have questions, suggestions, bug reports? Reach the project community via these channels:
 
- * [jaeger-tracing mail group](https://groups.google.com/forum/#!forum/jaeger-tracing)
- * [Slack chat room](https://cloud-native.slack.com/archives/CGG7NFUJ3)
- * [Github issues](https://github.com/jaegertracing/jaeger/issues)
+ * [Slack chat room `#jaeger`][slack] (need to join [CNCF Slack][slack-join] for the first time)
+ * [`jaeger-tracing` mail group](https://groups.google.com/forum/#!forum/jaeger-tracing)
+ * GitHub [issues](https://github.com/jaegertracing/jaeger/issues) and [discussions](https://github.com/jaegertracing/jaeger/discussions)
 
 ## Adopters
 
@@ -201,4 +201,5 @@ If you would like to add your organization to the list, please comment on our
 [community-stats]: https://all.devstats.cncf.io/d/54/project-health?orgId=1&var-repogroup_name=Jaeger
 [hotrod-tutorial]: https://medium.com/@YuriShkuro/take-opentracing-for-a-hotrod-ride-f6e3141f7941
 [slack]: https://cloud-native.slack.com/archives/CGG7NFUJ3
+[slack-join]: https://slack.cncf.io
 [slack-img]: https://img.shields.io/badge/slack-join%20chat%20%E2%86%92-brightgreen?logo=slack