Wait until qbittorrent is reachable on startup

src/main.rs

@@ -38,7 +38,13 @@ fn main() -> anyhow::Result<()> {
         println!("Couldn't find {}", config.port_file);
         println!("Trying again in 10 seconds");
         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>| {