The closest I’ve gotten to playing with Docker is Distrobox while trying out Fedora Silverblue or openSUSE MicroOS, where most of the Docker functions are abstracted away. If I need something on my LAN where Docker is the best/only option, then yeah, I’d definitely dig into it.
My approach to tech in general is a combination of just-in-time learning & you-ain’t-gonna-need-it, so… [shrugs]
I used to use Joplin, I liked that it integrated with my Nextcloud, and the markdown format. However, the way that it handles the markdown files was too black-boxey to me, with the way it split them up in a weird scheme.
Now I use Ghostwriter with straight markdown files inside my Nextcloud folder. So I still get the syncing functionality, but a more flexible setup that doesn’t require a specific app to access all of my notes.