fix(localhost): adjust documentation to work on dev, closes tauri-app…

…s#388 (tauri-apps#389)

plugins/localhost/README.md

@@ -41,14 +41,21 @@ fn main() {
   let window_url = WindowUrl::External(url);
   // rewrite the config so the IPC is enabled on this URL
   context.config_mut().build.dist_dir = AppUrl::Url(window_url.clone());
-  context.config_mut().build.dev_path = AppUrl::Url(window_url.clone());
 
   tauri::Builder::default()
     .plugin(tauri_plugin_localhost::Builder::new(port).build())
     .setup(move |app| {
-      WindowBuilder::new(app, "main".to_string(), window_url)
-        .title("Localhost Example")
-        .build()?;
+      WindowBuilder::new(
+        app,
+        "main".to_string(),
+        if cfg!(dev) {
+          Default::default()
+        } else {
+          window_url
+        }
+      )
+      .title("Localhost Example")
+      .build()?;
       Ok(())
     })
     .run(context)