Add readme to illustate how to tigger release job

Issue-ID: INF-15
Signed-off-by: Bin Yang <bin.yang@windriver.com>
Change-Id: If1b19b33a33078ca09c1d15002c135b94bd23e0a
diff --git a/releases/README.md b/releases/README.md
new file mode 100644
index 0000000..877af8b
--- /dev/null
+++ b/releases/README.md
@@ -0,0 +1,13 @@
+### How to tigger release job
+
+
+1, Submit a patch with file pathname with pattern: releases/oran-shell-release*.yaml
+while * can be any string.
+
+
+2, Merge this patch.
+
+
+3, the oran jenkins job 'pti-rpt-shell-release-master' will be triggered to build and publish
+images
+