From da5026859d1665d8a7724afe5ac544bb087342f2 Mon Sep 17 00:00:00 2001
From: Wu Cheng-Han
Date: Thu, 12 Oct 2017 02:07:03 +0800
Subject: Update contributing guide for signed-off and DCO

---
 CONTRIBUTING.md | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index c561d25a..b002e549 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -6,14 +6,14 @@ email, or any other method with the owners of this repository before making a ch
 Please note we have a code of conduct, please follow it in all your interactions with the project.
 
 ## Pull Request Process
-
-1. Ensure any install or build dependencies are removed before the end of the layer when doing a 
+1. Ensure you signed all your commits with Developer Certificate of Origin (DCO).
+2. Ensure any install or build dependencies are removed before the end of the layer when doing a 
    build.
-2. Update the README.md with details of changes to the interface, this includes new environment 
+3. Update the README.md with details of changes to the interface, this includes new environment 
    variables, exposed ports, useful file locations and container parameters.
-3. Increase the version numbers in any examples files and the README.md to the new version that this
+4. Increase the version numbers in any examples files and the README.md to the new version that this
    Pull Request would represent. The versioning scheme we use is [SemVer](http://semver.org/).
-4. You may merge the Pull Request in once you have the sign-off of two other developers, or if you 
+5. You may merge the Pull Request in once you have the sign-off of two other developers, or if you 
    do not have permission to do that, you may request the second reviewer to merge it for you.
 
 ## Contributor Code of Conduct
-- 
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