I just used the tool linked here in the documentation to create a Bootstrap theme, but I can't find the folder they're referencing. I've used Ansible to install Lemmy, which is working fine, but I'm not really sure how to handle themes as a result. Do I place them somewhere in my Ansible stuff, or is there that directory somewhere on the server? I found the Docker /volumes/ folder, but the directory names were random strings and not labeled like they supposedly are at the link above.
According to the docs, there should be a lemmy-ui folder that was created by the Ansible install. Within that folder, the app is set up to search for an extra_themes folder by default.
For native installation (without Docker), themes are loaded by lemmy-ui from ./extra_themes folder. A different path can be specified with LEMMY_UI_EXTRA_THEMES_FOLDER environment variable.
That /app/ prefix was an annoyance to figure out when I was trying to get this working the other day. It's not super clear without digging into the docker. I didn't think to check ansible repo.
That env variable isn't really useful currently as there's a bug with where they build the full path differently in two spots. If you use it you'll probably experience themes showing up in the list but giving you the default theme when you try using it.