This (what to turn off to stop resources being used by the dormant WP sites, and thus saving me to straightway delete /www/domainname folders) is what I was researching for right now, and was shying to ask here.
You again (count lost now) nailed it.
But how can I stop (outer) nginx (I’ve no apache installed) when the same nginx is serving discourse container also. Surely I’d turn off MySql for those websites which are not very much needed currently.