parsing after server and app

WatcherAgent/src/config.rs

@@ -26,9 +26,14 @@ impl Settings {
         let builder = config::Config::builder()
             .add_source(File::with_name("Settings").required(false))
             .add_source(
-                Environment::default()
-                    .separator("_") // "APP" maps to struct `app`
-                    .try_parsing(true),
+                Environment::with_prefix("APP")
+                    .separator("_")
+                    .prefix_separator("_"),
+            )
+            .add_source(
+                Environment::with_prefix("SERVER")
+                    .separator("_")
+                    .prefix_separator("_"),
             );
 
         builder.build()?.try_deserialize()