Mention #krew slack room (#495)

Signed-off-by: Ahmet Alp Balkan <[email protected]>

Author: ahmetb

CONTRIBUTING.md

@@ -22,8 +22,10 @@ If your repo has certain guidelines for contribution, put them here ahead of the
 
 ## Contact Information
 
-To discuss about this project, you can use the following channels, or attend
-[SIG CLI meetings](https://github.com/kubernetes/community/tree/master/sig-cli).
+To discuss about this project, you can use the following channels. You can find
+Krew maintainers at:
 
-- [SIG CLI Slack channel](https://kubernetes.slack.com/messages/sig-cli)
+- Kubernetes Slack channel:
+  [**#krew**](https://kubernetes.slack.com/messages/krew) or
+  [#sig-cli](https://kubernetes.slack.com/messages/sig-cli)
 - [SIG CLI Mailing list](https://groups.google.com/forum/#!forum/kubernetes-sig-cli)

README.md

@@ -157,14 +157,15 @@ new features and changes.
 
 ### Communication channels
 
-* [Slack](https://kubernetes.slack.com/messages/sig-cli) #sig-cli
+* Slack: [#krew](https://kubernetes.slack.com/messages/krew) or
+  [#sig-cli](https://kubernetes.slack.com/messages/sig-cli)
 * [Mailing List](https://groups.google.com/forum/#!forum/kubernetes-sig-cli)
 * [Kubernetes Community site](http://kubernetes.io/community/)
 
 ### Contributing
 
 Interested in contributing to Krew? Please refer to our
-[Contributing Guidelines](./docs/CONTRIBUTOR_GUIDE.md) for more details
+[Contributing Guidelines](./docs/CONTRIBUTOR_GUIDE.md) for more details.
 
 ### Code of Conduct
 

docs/DEVELOPER_GUIDE.md

@@ -1,4 +1,4 @@
-# Developer Guide
+# Developer Guide 
 
 This guide is intended for plugin developers. If you are not developing kubectl
 plugins, read the [User Guide](./USER_GUIDE.md) to learn how to use krew.
@@ -22,6 +22,10 @@ available on the krew index.
 
 <!-- /TOC -->
 
+Find Krew maintainers on [#krew](https://kubernetes.slack.com/messages/krew)
+room on Kubernetes Slack channel to ask questions, or simply open an issue if
+something is missing.
+
 ## Developing a Plugin
 
 Before creating a plugin, read the [Kubernetes Plugins documentation][plugins].
@@ -336,8 +340,8 @@ they have installed.
 
 ### Automate releasing new versions on krew-index
 
-You can use Github Actions to publish new release of your Krew plugin. 
-`krew-release-bot` is a Github Action to automatically bump the version in 
+You can use Github Actions to publish new release of your Krew plugin.
+`krew-release-bot` is a Github Action to automatically bump the version in
 `krew-index` repo. 
 Refer to the [krew-release-bot](https://github.com/rajatjindal/krew-release-bot) documentation for details.