add README.md

Author: ivanovnikolay

README.md

@@ -34,3 +34,12 @@ License: [GNU Affero GPL 3](http://www.gnu.org/licenses/agpl.html "GNU Affero GP
 
 SaaS version: [http://www.onlyoffice.com/highlights.aspx](http://www.onlyoffice.com/highlights.aspx "http://www.onlyoffice.com/highlights.aspx")
 
+
+Documentation
+========================
+
+You can compile ONLYOFFICE Collaborative Suite and install it to your local server yourself or use our installer to skip compilation stage and install it for you.
+The following documentation is available to the community depending on the way you choose:
+
+* [Compiling ONLYOFFICE Collaborative Suite Guide](https://help.teamlab.com/products/files/doceditor.aspx?fileid=3457567&doc=RjVTWndkNUxkTk1XRlBkVE9zemZQUT09PyIzNDU3NTY3Ig2 "Compiling ONLYOFFICE Collaborative Suite Guide")
+* [ONLYOFFICE Collaborative Suite Installation Guide](https://help.teamlab.com/products/files/doceditor.aspx?fileid=3457752&doc=aVc3TlhjL0lqSDhETzUzeHJNWWRlQT09PyIzNDU3NzUyIg2 "ONLYOFFICE Collaborative Suite Guide")