move docker file  location & add version

Change-Id: I9259bc2379a2a1c106d5ecd855b7e5df8830e17e
diff --git a/VERSION b/VERSION
new file mode 100644
index 0000000..519af9a
--- /dev/null
+++ b/VERSION
@@ -0,0 +1 @@
+6.0.0.dev