Switch from CLA to DCO for contributions

Updates our contributing documentation to mention the use of DCO now and removes mention of the CLA we will no longer use. Disables the DCO check for org members who are all employed by Broadcom.
micrometer-metrics · Jan 15, 2025 · 55e0540 · 55e0540
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diff --git a/.github/dco.yml b/.github/dco.yml
@@ -0,0 +1,2 @@
+require:
+  members: false
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -24,10 +24,10 @@ For example, those with Micrometer Tracing knowledge and experience can contribu
 The remainder of this document will focus on guidance for contributing code changes. It will help contributors to build,
 modify, or test the Micrometer Tracing source code.
 
-## Contributor License Agreement
+## Include a Signed Off By Trailer
 
-Contributions in the form of source changes require that you fill out and submit
-the [Contributor License Agreement](https://cla.pivotal.io/sign/pivotal) if you have not done so previously.
+All commits must include a *Signed-off-by* trailer at the end of each commit message to indicate that the contributor agrees to the [Developer Certificate of Origin](https://developercertificate.org).
+For additional details, please refer to the blog post [Hello DCO, Goodbye CLA: Simplifying Contributions to Spring](https://spring.io/blog/2025/01/06/hello-dco-goodbye-cla-simplifying-contributions-to-spring).
 
 ## Getting the source