Add playlist name and track limit environment config

src/main.rs

@@ -16,6 +16,14 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     let redirect_uri = std::env::var("SPOTIFY_REDIRECT_URI")
         .unwrap_or("http://127.0.0.1:8888/callback".to_string());
 
+    let playlist_name = std::env::var("PLAYLIST_NAME")
+        .unwrap_or("My Current Top Tracks".to_string());
+
+    let track_limit: usize = std::env::var("PLAYLIST_TRACK_LIMIT")
+        .unwrap_or("25".to_string())
+        .parse()
+        .expect("SPOTIFY_TRACK_LIMIT must be a valid number");
+
     let credentials = Credentials::new(&client_id, &client_secret);
 
     let oauth = OAuth {