document Plex support

sample.env

@@ -1,16 +1,16 @@
-# Music system you use (jellyfin, mpd or subsonic)
+# Music system you use (jellyfin, mpd, plex or subsonic)
 EXPLO_SYSTEM=subsonic
-# Address of music system (required for subsonic, jellyfin)
+# Address of music system (required for jellyfin, plex and subsonic)
 SYSTEM_URL=http://127.0.0.1:4533
-# User which has admin access to the music server (required for subsonic)
+# User which has admin access to the music server (required for subsonic and plex)
 SYSTEM_USERNAME=
-# Password for the user (required for subsonic)
+# Password for the user (required for subsonic and plex)
 SYSTEM_PASSWORD=
 # API Key from music server (required for jellyfin)
 API_KEY=
 # Directory where to download tracks (required)
 # PS! It's recommended to make a separate directory (under the music library) for Explo
-DOWNLOAD_DIR=/path/to/music/folder/
+DOWNLOAD_DIR=/path/to/music/folder/explo
 # Directory where to make m3u playlist files (required for mpd)
 PLAYLIST_DIR=/path/to/m3u/playlist/folder
 # Username for ListenBrain recommendations (required)
@@ -24,7 +24,7 @@ YOUTUBE_API_KEY=
 # FFMPEG_PATH=
 # Assign a custom path to yt-dlp
 # YTDLP_PATH=
-# Library in Jellyfin to use (optional, leave empty to create a new library based on DOWNLOAD_DIR)
+# Library in Jellyfin/Plex to use (optional, leave empty to create a new library based on DOWNLOAD_DIR)
 # LIBRARY_NAME=
 # Define a custom filename sepatator for special characters
 # FILENAME_SEPARATOR=