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

Change-Id: I7f3457882830de050d1357254fc5483faf91d03f
diff --git a/xos-db/Chart.yaml b/xos-db/Chart.yaml
index 677cbc9..e66aac5 100644
--- a/xos-db/Chart.yaml
+++ b/xos-db/Chart.yaml
@@ -14,4 +14,9 @@
 # limitations under the License.
 
 name: xos-db
-version: 0.1.0-dev0
+version: 1.0.0
+
+icon: https://www.postgresql.org/media/img/about/press/elephant.png
+
+# Postgres container from: https://hub.docker.com/_/postgres/
+appVersion: '10.3-alpine'