Here is documentation on starting your own theme: https://docs.nodebb.org/development/themes/
If you want to make small style changes, it's best to do it in the custom CSS portion of the ACP, instead of editing the theme files directly.
Hi all, currently i found persona theme on
node_modules/nodebb-plugin-persona, so if i edit from here, when i update new package version, it will override my edited ?
have some any choices ?
That is correct. You need to make a new node module, following instructions here:
You can also make css and js adjustments from the appearance tab in the admin panel. These are never overwritten.