Update wiki

wiki/_Sidebar.md

@@ -1,7 +1,7 @@
 [[[https://github.com/SpaceVim/SpaceVim/raw/dev/docs/logo.png|alt=SpaceVim home]]](Home)
 --
-[Introduction](Introduction)   
-[Community](https://spacevim.org/community/)  
+[Introduction](introduction)   
+[Community](community)  
 [FAQ](FAQ)  
 [Layers](https://spacevim.org/layers/)
 

wiki/community.md

@@ -0,0 +1,27 @@
+# Community
+
+Visit these resources for help or general questions.
+
+## Discuss
+
+- [/r/spacevim on Reddit](https://reddit.com/r/spacevim)
+- [Mailing list](https://groups.google.com/forum/#!forum/spacevim)
+- [Twitter](https://twitter.com/SpaceVim)
+- [Facebook](https://www.facebook.com/SpaceVim)
+
+## Ask
+
+- Try [vi.stackexchange.com](https://vi.stackexchange.com/) for **usage and configuration questions**.
+- [issue tracker](https://github.com/SpaceVim/SpaceVim/issues) for issue and feature requests
+
+## Chat
+
+All of these channels are bridged together. Click on one of the badges below to join the chat, In all of these channels, messages from `SpaceVimBot` is sent by remote user, and the format of the remote messages is:
+
+    "[{PROTOCOL}] <{NICK}> {MESSAGE}"
+
+- [`SpaceVim/SpaceVim`  on gitter](https://gitter.im/SpaceVim/SpaceVim)
+- [`#spacevim` on FreeNode](https://webchat.freenode.net/?channels=spacevim)
+- [`t.me/SpaceVim` on telegram](https://t.me/SpaceVim)
+- [`#spacevim:matrix.org` on Matrix](https://riot.im/app/#/room/%23spacevim:matrix.org)
+- [`#spacevim` on slack](https://spacevim.slack.com/messages/C88CTJ62J)