Add dockerfile for MDG's

- Added option to installer to use specfic docker build tag

Change-Id: Ia6cf6316c6fb84a18ecdbaf98747a95c20ce2f0b
Signed-off-by: Mike Marchetti <mmarchetti@sandvine.com>
diff --git a/docker/RO/Makefile b/docker/RO/Makefile
new file mode 100644
index 0000000..d64462a
--- /dev/null
+++ b/docker/RO/Makefile
@@ -0,0 +1,3 @@
+include ../mk/Makefile.include
+
+MDG=$(shell basename $(CURDIR))