PHP 8.4 with the usual extensions (gd, intl, mbstring, pdo_mysql), MariaDB 10.11 or newer (MySQL 8 should work) and any web server. One small VPS is enough for a site with a few editors; Docker setups for development and production are included.
Installing works on your own computer (with or without Docker), on a server (Debian or Ubuntu, with or without Docker) and on shared hosting with SSH and PHP 8.4. There is no build step and no Node.js: the site boots from its sources on plain OPcache, and bin/atar doctor checks the result.