https://github.com/chunqiuyiyu/xie?tab=readme-ov-file#prereq... says it needs NodeJS; is that just for building? Could you make a release on github that includes it as a single .html file that could be downloaded and used with no deps but a browser?
in the gh-pages branch you have the final index.html. You can also literally download/save the page as well, should be the same.
It does not use any other deps than the final index.html
Now, speaking about the project itself, maybe it would be good if the notes get also saved into localStorage in some way. One browser refresh or reboot and it all goes away if it wasn't saved.