doc: added small note about slack channel
diff --git a/README.md b/README.md
index c92faa9..aeca993 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,13 @@
 # Atmosphere
 
+## Community
+
+If you have any questions and discussions about Atmosphere, you can join the
+community:
+
+* [`#atmosphere`](https://kubernetes.slack.com/archives/C056YSPJB7U) channel
+  on the Kubernetes Slack.
+
 ## Quick Start
 
 The quick start intends to provide the most near-production experience possible,