With the growing number of servers I administrate I sometimes loose the track and feel the need to keep a diary and notepad of the interventions I do on the server (server characteristics, updates, installations, small personal howto, tip&tricks, …).
My wish list :
Notes stored in the cloud (web server, nextcloud, …)
Notes can be sorted by creation date
Syntax highlighting and Markdown enabled
Search engine
I currently use Quiver and am pretty happy with it (except for the second requirement) but it has multiple sync issues when used on more than one machine on a shared nextcloud folder.
Maybe a strange suggestion, but have a look at Zammad (See wiki). You can mail/reply your own Zammad instance on the same ticket number (server). From within Zammad tickets, you can have/create links to your Nextcloud detailed notes/markdown/whatever.