Merge remote-tracking branch 'origin/dev-contributing' into stable

CONTRIBUTING.md

@@ -6,9 +6,17 @@ We use Git to share and merge our code.
 
 ## Style
 
-We are using the common Haskell Style: 
+We are using the common Haskell Style:
 https://github.com/tibbe/haskell-style-guide/blob/master/haskell-style.md
 
 ## Code Of Conduct
 
 Be constructive as sharing our code of conduct
+
+## Chat with us
+
+We are on IRC: #gargantext @ oftc.net
+
+You can join via Matrix, just search for: #_oftc_#gargantext:matrix.org
+
+You can also join via XMPP: #gargantext%irc.oftc.net@irc.jabberfr.org