The simplest case.
WHAT YOU NEED
Hosting that serves files. Any plan.
HOW TO PUBLISH
Upload the files to public_html.
That is all.
WHAT TO SET UP
SSL, through AutoSSL A redirect from www to non-www, or the reverse Error pages
WHAT YOU DO NOT NEED
A database PHP, though it remains available Most of what a WordPress site needs
PERFORMANCE
Already fast. Browser caching and compression make it faster.
Both are configurable in .htaccess or already enabled.
BACKUPS
The files are the site. Keep a copy of your source and your output.
If you use a generator, the source is what matters.
WHAT TO WATCH FOR
Uploading the wrong directory, so the site does not appear Missing hidden files Old files left behind from a previous version
FOR UPDATES
Rebuild, upload, clear any caching.