Link to official gogs documentation added

Guides/gogs.md

@@ -2,8 +2,13 @@
 
 _The lightweigth github clone_
 
+
+## Resources
+
 Use command `./gogs help` to list gogs commands.
 
+[Official Gogs documentation](https://gogs.io/docs)
+
 ## PostgreSQL setup
 
 ### Create gogs user