add cmd as an alias and added exit 0

src/main.rs

@@ -78,6 +78,8 @@ async fn main() {
     if let Err(why) = client.start().await {
         println!("An error occurred while running the client: {:?} \n Check that there is a bot token set in config", why);
     }
+
+    std::process::exit(0);
 }