zenohd-default config error #1292 (#1298)

* Zenohd panic when tring load file

When zenohd trying load file, if it have a problem it crash cause another treat was "unwrap", and it return to a type config. So, it crash and cause painic.

* zenohd default config error #1292

When tring load config file defined by -c option. With haver any problema "unwrap" has been to Config type.

I treat it return a Default Config whe it happen

* If file fail when try load configs

If file fail when try load configs

* Update main.rs

* Resolve typos at comment

Resolve typos at comment

zenohd/src/main.rs

@@ -123,7 +123,11 @@ fn config_from_args(args: &Args) -> Config {
         .config
         .as_ref()
         .map_or_else(Config::default, |conf_file| {
-            Config::from_file(conf_file).unwrap()
+            Config::from_file(conf_file).unwrap_or_else(|e| {
+                // if file load fail, wanning it, and load default config
+                tracing::warn!("Warn: File {} not found! {}", conf_file, e.to_string());
+                Config::default()
+            })
         });
 
     if config.mode().is_none() {