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/administration.rst b/docs/sections/services/dfc/administration.rst
new file mode 100644
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+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+
+Administration
+==============
+DFC has a healthcheck functionality. The service can then be started and stopped through an API. One can also check the liveliness of the service.
+
+Main API Endpoints
+""""""""""""""""""
+Running with dev-mode of DFC
+    - Heartbeat: **http://<container_address>:8100/heartbeat** or **https://<container_address>:8433/heartbeat**
+    - Start DFC: **http://<container_address>:8100/start** or **https://<container_address>:8433/start**
+    - Stop DFC: **http://<container_address>:8100/stopDatafile** or **https://<container_address>:8433/stopDatafile**
+
+The external port allocated for 8100 (http) is 30245.