docs: update configuration for ESM

docs/configuration.md

@@ -1,30 +1,29 @@
 # Configuration
 
-The recommended way to configure and start Docsify is to import the ES module
-from a CDN and create a new `Docsify` instance:
+You can configure Docsify by defining `window.$docsify` as an object:
 
 ```html
-<script type="module">
-  import { Docsify } from '//cdn.jsdelivr.net/npm/docsify@5/dist/docsify.module.min.js';
-
-  new Docsify({
+<script>
+  window.$docsify = {
     repo: 'docsifyjs/docsify',
     maxLevel: 3,
     coverpage: true,
-  });
+  };
 </script>
 ```
 
-If you load the classic Docsify script instead, you can configure Docsify by
-defining `window.$docsify` as an object:
+Docsify is also available as an ES module. Import `Docsify` from a CDN and pass
+the configuration object to a new `Docsify` instance:
 
 ```html
-<script>
-  window.$docsify = {
+<script type="module">
+  import { Docsify } from '//cdn.jsdelivr.net/npm/docsify@5/dist/docsify.module.min.js';
+
+  new Docsify({
     repo: 'docsifyjs/docsify',
     maxLevel: 3,
     coverpage: true,
-  };
+  });
 </script>
 ```