Backup mentioned in the migrate section

Guides/gogs.md

@@ -59,6 +59,14 @@ Example of repository url using SSH :
 
 ## Migrate
 
+### Backup
+
+Gogs natively manages backups. Prefer to use gogs tools instead of _squared wheels_.
+
+`$ ./gogs backup --help`
+
+`$ ./gogs restore --help`
+
 ### Repositories
 
 `/home/gituser/gogs/gogs-repositories/`