docs: use local search (#22130)

Author: bluwy

docs/.vitepress/config.ts

@@ -160,15 +160,18 @@ const config = defineConfig({
     ],
 
     search: {
-      provider: 'algolia',
+      provider: 'local',
       options: {
-        appId: '7H67QR5P0A',
-        apiKey: '208bb9c14574939326032b937431014b',
-        indexName: 'vitejs',
-        searchParameters: {
-          facetFilters: ['tags:en'],
+        miniSearch: {
+          searchOptions: {
+            boostDocument(page) {
+              if (page.startsWith('/guide/')) return 2 // Prefer guide pages
+              if (page.startsWith('/config/')) return 1.5 // Then config pages
+              if (page.startsWith('/blog/')) return 0 // Do not index blog posts
+              return 1
+            },
+          },
         },
-        insights: true,
       },
     },
 

docs/public/_redirects

@@ -1,4 +1,3 @@
-# temporary, we'll flip this around some day
 https://vitejs.dev/* https://vite.dev/:splat 301!
 
 /guide/api-vite-runtime /guide/api-environment 301