local-ci-build: add link to docker docs

Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
Signed-off-by: Emily Shaffer <emilyshaffer@google.com>
Change-Id: I2b2429e4b104d9d1c9c7b6b820389e63e1d5cd99
diff --git a/local-ci-build.md b/local-ci-build.md
index 374ec8d..7a2f278 100644
--- a/local-ci-build.md
+++ b/local-ci-build.md
@@ -2,7 +2,13 @@
 
 These instructions pertain to running the upstream OpenBMC CI locally.
 
-Please install and configure Docker.
+Please install and configure Docker. The installation of Docker CE (Community
+Edition) varies by platform and may differ in your organization, but the
+[Docker Docs](https://docs.docker.com/install/) are a good place to start
+looking.
+
+Check that the installation was successful by running `sudo docker run
+hello-world`.
 
 Each repository is built locally within the CI using the bootstrap.sh and
 automake toolchain.