fix hardcoded .env file check

src/main.rs

@@ -9,7 +9,7 @@ use std::sync::Arc;
 
 #[tokio::main]
 async fn main() {
-    dotenv().expect("Failed to load .env file");
+    dotenv().ok();
 
     let token = std::env::var("DISCORD_TOKEN").expect("Expected DISCORD_TOKEN in environment");