some changes

systemd/rustpad.yaml

@@ -9,6 +9,8 @@ database:
 
 static_dir: /opt/rustpad/static
 files_dir: /var/lib/rustpad/files
+# Optional; bare domains are normalized to HTTPS. Serve or proxy /f/* there.
+# files_public_url: files.note.example.org
 storage_driver: local
 upload_max_size_mb: 20
 asset_cache_max_age_seconds: 600