XOS/NEM charts, use a global registry var, split docker image name/tag/pullPolicy

Change-Id: I7f3457882830de050d1357254fc5483faf91d03f
diff --git a/xos-gui/Chart.yaml b/xos-gui/Chart.yaml
index a1efce3..9d0a081 100644
--- a/xos-gui/Chart.yaml
+++ b/xos-gui/Chart.yaml
@@ -15,5 +15,8 @@
 
 name: xos-gui
 description: Web GUI for XOS
-version: 1.1.0-dev
+icon: https://guide.opencord.org/logos/xos.svg
+version: 1.2.0
 
+# appVersion is of the xos-gui container, xos-ws tag is specified in values.yaml
+appVersion: 1.0.3