I use Apple Notes for this, and it is surprisingly great. Being able to drag and drop images and screenshots is great.

Having them synchronized to the phone instantly is very convenient. As a bonus, I can add sketches when I open notes on my iPad using the Apple Pencil. It is sweeter because I can even search for a text fragment I hand-wrote in one of those sketches.

Saying all of this here because, I wish there was an open source/self-hosted alternative that did that. This website showed portable apps on all platforms, and open source, got me very excited until I realized I can't just drag and drop images into a note. Neither can I add sketches on the fly.

Sorry, I didn't mean to critique your open source effort, and sound negative. My intent is to highlight an alternative that I enjoy, and perhaps bring some ideas for discussion.