add specification

Author: LumePart

sample.env

@@ -19,7 +19,7 @@ SYSTEM_USERNAME=
 SYSTEM_PASSWORD=
 # API Key from your media system (required for emby and jellyfin, optional for plex)
 API_KEY=
-# Name of the music library in your system
+# Name of the music library in your system (emby, jellyfin, plex)
 LIBRARY_NAME=
 
 # === Downloader Configuration ===
@@ -54,6 +54,9 @@ YOUTUBE_API_KEY=
 # SLSKD_RETRY=5
 # Number of download attempts for a track (default: 3)
 # SLSKD_DL_ATTEMPTS=3
+
+## Slskd Filtering
+
 # Comma-separated (without spaces) file extensions to download from (default: flac,mp3)
 # EXTENSIONS=flac,mp3
 # Minimal Bit Depth (default: 8)