main: Add a randomized delay before fetching feeds

src/main.rs

@@ -63,6 +63,11 @@ async fn main() -> anyhow::Result<()> {
         tokio::spawn(async move {
 
             loop {
+                let delay = rand::random::<u64>() % (feed_config.delay / 5);
+
+                debug!("Adding randomized delay: {}", delay);
+                sleep(Duration::from_secs(delay)).await;
+
                 let feed: Option<_> = match fetch_and_parse_feed(&feed_config.url).await {
                     Ok(f) => Some(f),
                     Err(e) => {