Add more community channels

community/index.md

@@ -9,11 +9,13 @@ This documentation describes how to communicate with the PGroonga developers and
 
 ## How to ask about PGroonga related things
 
-You can ask about PGroonga related things on mailing list or GitHub issues. You can communicate with both the developers and other users on mailing list. You can communicate with only developers on GitHub issues.
+You can ask about PGroonga related things on mailing list, GitHub issues and chat room. You can communicate with both the developers and other users on mailing list chat room. You can communicate with only developers on GitHub issues and.
 
-If you have a question about how to use PGroonga, mailing list is better. Because other users may have knowledge and provide it to you. Otherwise, the developers will help you.
+If you have a question about how to use PGroonga, mailing list or chat room is better. Because other users may have knowledge and provide it to you. Otherwise, the developers will help you.
 
-If you find a PGroonga problem, GitHub issues is better. The developers will solve your problem.
+If you get a PGroonga problem, GitHub issues is better. The developers will solve your problem.
+
+{: #mailing-list}
 
 ### Mailing list
 
@@ -22,9 +24,41 @@ Here is the mailing list for PGroonga:
  * [groonga-talk (English)](https://lists.sourceforge.net/lists/listinfo/groonga-talk)
  * [groonga-dev (Japanese)](http://lists.osdn.me/mailman/listinfo/groonga-dev)
 
+{: #github-issues}
+
 ### GitHub issues
 
 Here is a list of PGroonga related the GitHub issues:
 
  * [Issues - pgroonga/pgroonga](https://github.com/pgroonga/pgroonga/issues) for PGroonga.
- * [Issues - pgroonga/pgroonga.github.io](https://github.com/pgroonga/pgroonga.github.io/issues) for this web site.
+ * [Issues - pgroonga/pgroonga.github.io](https://github.com/pgroonga/pgroonga.github.io/issues) for this Web site.
+
+{: #chat}
+
+### Chat room
+
+You can join [groonga/public chat room on Gitter](https://gitter.im/groonga/public>).
+
+## How to get the latest information
+
+You can get the latest information on mailing list, Twitter and Facebook. For example, you can get release announce.
+
+### Mailing list
+
+See [the above section](#mailing-list).
+
+{: #twitter}
+
+### Twitter
+
+[@groonga](https://twitter.com/groonga/) tweets PGroonga related information.
+
+Please follow the account to get the latest PGroonga related information!
+
+{: #facebook}
+
+### Facebook
+
+[Groonga page on Facebook](http://www.facebook.com/groonga) shares PGroonga related information.
+
+Please like the page to get the latest PGroonga related information!