VOL-3970 lock down deploy image

- use distroless base image for deployment
- use nonroot user/group for image
- update Makefile to support dev/prod docker image builds
- clean up makefile including auto generated help

Change-Id: I14836d4b8595718d86ad07307d7c7cfe8f97acba
diff --git a/VERSION b/VERSION
index dbe5900..edfc322 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.8.1
+2.8.2-dev