- Minor compose / dockerfile args & structure improvements,

- Use now rx3/base-mga9:1.2.3 image.

ReadMe.txt

@@ -5,7 +5,7 @@ Welcome to Rx3/Server-Mga9 docker image!
 This is project aims to build a Mageia-9 server docker image to be used by others Rx3 packaging projects.
 
 Features:
-    - Curtently based on rx3/base-mga9:1.2.2 image,
+    - Curtently based on rx3/base-mga9:1.2.3 image,
     - Init script calling in order sub scripts in /etc/init.d & /etc/rcD.d,
     - supervisord managing services,
     - crond & logrotate configured.