README.md added description

Signed-off-by: ormorph <roma251078@mail.ru>

README.md

@@ -36,6 +36,20 @@ Some guideline for this overlay is: **Freedom of choice** for everything. There
 
 ``` layman -o https://mirror.git.trinitydesktop.org/gitea/TDE/tde-packaging-gentoo/raw/branch/master/Documentation/overlay.xml -f -a trinity-official ```
 
+#### or:
+
+`/etc/portage/repos.conf/tde.conf:`
+```
+[trinity-official]
+location = /var/db/repos/trinity-official
+sync-type = git
+sync-uri = https://mirror.git.trinitydesktop.org/gitea/TDE/tde-packaging-gentoo.git
+auto-sync = yes
+```
+```
+# emaint sync  -r trinity-official
+```
+
 #### For the rsync way of sync just use: ####
 
 ``` layman -o https://mirror.git.trinitydesktop.org/gitea/TDE/tde-packaging-gentoo/raw/branch/master/Documentation/overlay-rsync.xml -f -a trinity-official ```