The filesystem is the best CMS. For my static blog I just stick to a file naming format like ~/www/blog/2020-10-17-1.html and then assemble post indices with shell and variations for monthly indices. The RSS feed generation is a 100 line perl script though.

    ~/www/blog/ $ ./recentblogposts.pl; ls -v 2020-*.html | tac | xargs cat > blog-2020.html