[Contribution] Automated Multi-arch Docker Image for chinadns-ng

[osmiumsilver]

Hello @zfl9,

First and foremost, thank you for your incredible work on chinadns-ng!

To make deployment easier for the community, I've created an automated CI/CD pipeline that tracks new upstream releases from your repository and publishes updated images daily for the project. Multi-arch supported (amd64 (v2,v3), arm64, arm/v7, arm/v6, and 386).

You can find the results here:

• Docker Hub Image: https://hub.docker.com/r/jenesequa/chinadns-ng
• Build Source & Workflow: https://github.com/osmiumsilver/docker-chinadns-ng

The build source repository is licensed under AGPL-3.0 to comply with the chinadns-ng license. It also contains a detailed README for users on Docker Hub.

I hope this contribution is valuable to the project and its users. Please feel free to link to it in your README in case you find it useful, or let me know if there's any way I can help further.

Keep up the amazing work!

Cheers,
osmiumsilver