Wait until qbittorrent is reachable on startup

src/main.rs

@@ -40,6 +40,12 @@ fn main() -> anyhow::Result<()> {
         std::thread::sleep(Duration::from_secs(10));
     }
 
+    while reqwest::blocking::get(config.qbit_full_url()).and_then(|r| r.error_for_status()).is_err() {
+        println!("Couldn't reach qbittorrent at {}", config.qbit_full_url());
+        println!("Trying again in 10 seconds");
+        std::thread::sleep(Duration::from_secs(10));
+    }
+
     let config_clone = config.clone();
     let mut watcher = notify::recommended_watcher(move |res: Result<Event, notify::Error>| {
         match res {