Update DFC documentation

Change-Id: I95befc4a6b597f67672797d44561de41af9c480d
Signed-off-by: Chengkai Yan <martin.c.yan@est.tech>
Issue-ID: DCAEGEN2-876
diff --git a/docs/sections/services/dfc/delivery.rst b/docs/sections/services/dfc/delivery.rst
new file mode 100644
index 0000000..233e254
--- /dev/null
+++ b/docs/sections/services/dfc/delivery.rst
@@ -0,0 +1,12 @@
+.. This work is licensed under a Creative Commons Attribution 4.0 International License.

+.. http://creativecommons.org/licenses/by/4.0

+

+Delivery

+========

+

+Docker Container

+----------------

+

+**datafile** is delivered as a docker container that can be downloaded from onap:

+

+    ``docker run -d -p 8100:8100 -p 8433:8433  nexus3.onap.org:10001/onap/org.onap.dcaegen2.collectors.datafile``