Add documentation for DCO compliance

Signed-off-by: copilot-swe-agent[bot] <[email protected]>

Author: Copilot

docs/dco-compliance.md

@@ -0,0 +1,57 @@
+# DCO Compliance
+
+This document explains how to ensure your commits comply with the Developer Certificate of Origin (DCO) requirements for this project.
+
+## What is the DCO?
+
+The Developer Certificate of Origin (DCO) is a lightweight way for contributors to certify that they wrote or otherwise have the right to submit the code they are contributing to the project. See the full text in the [CONTRIBUTING.md](../CONTRIBUTING.md#developer-certificate-of-origin-signing-your-work) file.
+
+## Adding DCO Sign-offs to Commits
+
+All commits must include a `Signed-off-by` line in the commit message. This line certifies that you have the right to submit your contribution under the project's license.
+
+### Using the -s Flag
+
+The simplest way to add a sign-off to your commits is to use the `-s` flag with the `git commit` command:
+
+```sh
+git commit -s -m "Your commit message"
+```
+
+This will automatically add a `Signed-off-by` line with your name and email to the commit message.
+
+### Configuring Git for Automatic Sign-offs
+
+You can configure Git to automatically add sign-offs to all your commits:
+
+```sh
+git config --global commit.signoff true
+```
+
+Alternatively, you can create a Git alias for creating signed-off commits:
+
+```sh
+git config --global alias.cs 'commit -s'
+```
+
+Then use `git cs` instead of `git commit` to create commits with sign-offs.
+
+### Adding Sign-offs to Existing Commits
+
+If you forgot to sign off your commits, you can amend them:
+
+```sh
+git commit --amend --no-edit --signoff
+```
+
+For multiple commits, you can use git rebase:
+
+```sh
+git rebase --signoff HEAD~n
+```
+
+Replace `n` with the number of commits you want to sign off.
+
+## Verification
+
+The project uses automated checks to verify that all commits include the required DCO sign-off. If you receive a DCO failure notification, please follow the instructions above to add the required sign-offs.