How does having the "BSD Zero Clause" with your content work? I open sourced my blog's software, but I still keep all the actual content in a separate private repo, since I don't want my written content distributed under the same license. Also works out well, since I have the github action automation in the private content repo.

I can still easily change the private flag down the road if I were to decommission it (though, unlikely -- I'd just archive it somewhere).

I'm also using Gatsby if anyone is curious (https://github.com/cbeley/beleyblog & https://chrisbeley.com).