Use single threaded runtime

src/main.rs

@@ -991,7 +991,7 @@ async fn set_password(
     Ok(Redirect::to("/"))
 }
 
-#[tokio::main]
+#[tokio::main(flavor = "current_thread")]
 async fn main() -> color_eyre::Result<()> {
     color_eyre::install()?;