docs: add algolia search config

docs/.vitepress/config.js

@@ -67,14 +67,15 @@ function getConfigSidebar() {
   return [
     {
       text: 'App Config',
-      children: [
-        { text: 'Basics', link: '/config/basics' },
-        { text: 'Carbon Ads', link: '/config/carbon-ads' }
-      ]
+      children: [{ text: 'Basics', link: '/config/basics' }]
     },
     {
       text: 'Theme Config',
-      children: [{ text: 'Homepage', link: '/config/homepage' }]
+      children: [
+        { text: 'Homepage', link: '/config/homepage' },
+        { text: 'Algolia Search', link: '/config/algolia-search' },
+        { text: 'Carbon Ads', link: '/config/carbon-ads' }
+      ]
     }
   ]
 }

docs/config/algolia-search.md

@@ -0,0 +1,16 @@
+# Theme Config: Algolia Search
+
+The `themeConfig.algolia` option allows you to use [Algolia DocSearch](https://docsearch.algolia.com/). To enable it, you need to provide at least apiKey and indexName:
+
+```js
+module.exports = {
+  themeConfig:{
+    algolia: {
+      apiKey: 'your_api_key',
+      indexName: 'index_name'
+    }
+  }
+}
+```
+
+For more options, check out [Algolia DocSearch's documentation](https://github.com/algolia/docsearch#docsearch-options).

docs/config/carbon-ads.md

@@ -1,13 +1,15 @@
-# App Config: Carbon Ads
+# Theme Config: Carbon Ads
 
 VitePress has built in native support for [Carbon Ads](https://www.carbonads.net). By defining the Carbon Ads credentials in config, VitePress will display ads on the page.
 
 ```js
 module.exports = {
-  carbonAds: {
-    carbon: 'your-carbon-key',
-    custom: 'your-carbon-custom',
-    placement: 'your-carbon-placement'
+  themeConfig: {
+    carbonAds: {
+      carbon: 'your-carbon-key',
+      custom: 'your-carbon-custom',
+      placement: 'your-carbon-placement'
+    }
   }
 }
 ```