diff --git a/src/webui/mod.rs b/src/webui/mod.rs
index 5290c0b..3b5b0b9 100644
--- a/src/webui/mod.rs
+++ b/src/webui/mod.rs
@@ -90,6 +90,10 @@ pub async fn web_ui_main(
 
     let tmpl_reloader = web::Data::new(tmpl_reloader);
 
+    // use r2d2 for connection pools (https://github.com/sfackler/r2d2 &
+    // https://github.com/ivanceras/r2d2-sqlite) use
+    // https://docs.rs/actix-web/4.3.1/actix_web/web/fn.block.html
+    // in handlers.
     let cloned_conn_fact = conn_fact.clone();
     let server = HttpServer::new(move || {
         App::new()