Include self-contained markdown directory as-is

Hi, I’m considering to use Zola for my project. I did the quickstart guide, and from the looks all markdown files have to use the special +++ syntax at the top of the file.

What I’d like to do is to build a small documentation page for a project. The project already has a /docs folder with self-contained markdown files (that also link to each other using ./filename.md). The problem is that I want the docs to remain independent, and thus should not have any Zola-specific macros like the attributes at the top. (The idea is to include that folder via submodule in the homepage repository, so it literally is off-limits) How can I use them nevertheless?