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.
According to the docs, there should be a
lemmy-uifolder that was created by the Ansible install. Within that folder, the app is set up to search for anextra_themesfolder by default.Digging into the
docker-compose.ymlfile used by the Ansible playbook, it looks like this is where extra themes directory is mapped into thelemmy-uiservice.