Building and running docker behind proxy.

If one is behind a proxy it will not be able to run the docker
according to information presented in this readme.
This commit adds a short note how to modify existing scripts
and build the docker when http proxy is used.

Signed-off-by: Zbigniew Kurzynski <zbigniew.kurzynski@intel.com>
Change-Id: I74c9ba1a28b5322a4e369a9391d605e280c43c18
diff --git a/testing/run-test-docker.md b/testing/run-test-docker.md
index 87b425c..afb5328 100644
--- a/testing/run-test-docker.md
+++ b/testing/run-test-docker.md
@@ -31,6 +31,11 @@
 
     `./scripts/build-qemu-robot-docker.sh`
 
+    ###### *Note: When your Docker is behind a proxy, add the following parameters to the build command (use proper IP and PORT values.)*
+
+    ```
+    --build-arg http_proxy=<IP>:<PORT> --build-arg https_proxy=<IP>:<PORT>
+    ```
 
 ## Code update process using robot test code
 
@@ -111,7 +116,7 @@
                --env HTTPS_PORT=443 \
                --env ROBOT_TEST_CMD="tox -e witherspoon -- tests" \
                --workdir ${HOME} \
-               --volume ${HOME}/OpenBMC_Automation:${HOME}
+               --volume ${HOME}/OpenBMC_Automation:${HOME} \
                --tty openbmc/ubuntu-robot-qemu \
                    ${HOME}/openbmc-build-scripts/scripts/run-robot.sh
     ```