Used r2d2 for db connection pool.

src/webui/mod.rs

@@ -13,7 +13,6 @@ use futures::{pin_mut, select, FutureExt};
 use minijinja;
 use minijinja_autoreload::AutoReloader;
 
-
 use crate::events::Event;
 use crate::util::{CustomResult, Error, SQLiteConnectionFactory};
 use crate::webui::services::{creat_db_pool, Services};