15964: Add a line about storing Dockerfiles in source control

Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <peter.amstutz@curii.com>

diff --git a/doc/user/topics/arv-docker.html.textile.liquid b/doc/user/topics/arv-docker.html.textile.liquid
index f039a6c3e8a5eece3da243bb8def3a7e88452241..d371400f5cacf0ea2368f474937ce42e295550aa 100644 (file)
--- a/doc/user/topics/arv-docker.html.textile.liquid
+++ b/doc/user/topics/arv-docker.html.textile.liquid
@@ -45,6 +45,8 @@ The "RUN" command is executed inside the container and can be any shell command
 
 You can also visit the "Docker tutorial":https://docs.docker.com/get-started/part2/ for more information and examples.
 
+You should add your Dockerfiles to the same source control repository as the Workflows that use them.
+
 h3. Create a new image
 
 We're now ready to create a new Docker image.  Use @docker build@ to create a new image from the Dockerfile.