[Feature] generate the 2 files needed by jlesage/docker-firefox

[strunzoz]

功能描述 / Description

Generate the TWO files I need for https://github.com/jlesage/docker-firefox?tab=readme-ov-file#certificates

请求动机 / Motivation

I clearly am not savvy enough to sort out the ideal permutation of domain cert, chain, and bundle

其他 / Miscellaneous

No response

贡献 / Contribution

• 我乐意为此贡献 PR！ / I am interested in contributing a PR for this!