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CONTRIBUTING.md

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+# Contributing
+
+## Developer Certificate of Origin
+
+The Developer Certificate of Origin (DCO) is a way to certify that you wrote or otherwise have the right to submit the code you are contributing to the project.
+
+By signing off on your contribution, you certify the following DCO (Version 1.1):
+
+> **Developer Certificate of Origin**
+> Version 1.1
+>
+> Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
+>
+> By making a contribution to this project, I certify that:
+>
+> (a) The contribution was created in whole or in part by me and I have the right to submit it under the open source license indicated in the file; or
+>
+> (b) The contribution is based upon previous work that, to the best of my knowledge, is covered under an appropriate open source license and I have the right under that license to submit that work with modifications, whether created in whole or in part by me, under the same open source license (unless I am permitted to submit under a different license), as indicated in the file; or
+>
+> (c) The contribution was provided directly to me by some other person who certified (a), (b) or (c) and I have not modified it.
+>
+> (d) I understand and agree that this project and the contribution are public and that a record of the contribution (including all personal information I submit with it, including my sign-off) is maintained indefinitely and may be redistributed consistent with this project or the open source license(s) involved.
+
+## Sign your work
+
+To certify the DCO, you must add a "Signed-off-by" line to your commit messages.
+
+**Important:** You must use your real name (no pseudonyms or anonymous contributions).
+
+**Example:**
+
+```text
+Fix typo in tokenizer config
+
+Signed-off-by: Your Name <your@email.com>
+```
+
+### Git Command
+
+If you are using the command line, you can sign off automatically by adding the `-s` flag:
+
+```bash
+git commit -s -m "Your commit message"
+```
+
+## Submitting changes
+
+1. **Fork the repository** on Hugging Face.
+2. **Create a branch** for your fix.
+3. **Commit your changes** with the `-s` flag to sign them.
+4. **Open a Pull Request** (PR) on the Community tab of the model page.