Merge branch '1.3.x'

Author: bclozel

.github/dco.yml

@@ -0,0 +1,3 @@
+require:
+  members: false
+

README.md

@@ -6,15 +6,16 @@
 
 This project is governed by the [Spring Code of Conduct](CODE_OF_CONDUCT.adoc). By participating, you are expected to uphold this code of conduct. Please report unacceptable behavior to [email protected].
 
+## Contributing
+
+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.
+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).
+
 ## Documentation
 
 This project has reference documentation ([published](https://docs.spring.io/spring-graphql/reference/) and [source](spring-graphql-docs/modules/ROOT)), an
 [API reference](https://docs.spring.io/spring-graphql/docs/current-SNAPSHOT/api/). There are [samples](https://github.com/spring-projects/spring-graphql/tree/1.0.x/samples) in the 1.0.x branch that will be [moved out](https://github.com/spring-projects/spring-graphql/issues/208) into a separate repository.
 
-## Continuous Integration Builds
-
-Information regarding CI builds can be found in the project's [Concourse pipeline](ci/README.adoc) documentation.
-
 ## Stay in Touch
 
 Follow [@SpringCentral](https://twitter.com/springcentral).