Add language filter to algolia search

Author: rigor789

src/main.js

@@ -17,12 +17,14 @@ document.addEventListener('DOMContentLoaded', () => {
     },
     mounted() {
       const selector = document.querySelector('.docSearch-input')
+      const lang = document.documentElement.lang || 'en'
 
       docsearch({
         apiKey: '31f842779e5b33726ec73f8f973b2202',
         indexName: 'nativescript-vue',
         inputSelector: selector,
-        debug: true // Set debug to true if you want to inspect the dropdown
+        algoliaOptions: {facetFilters: [`lang:${lang}`]},
+        debug: false
       })
     },
     destroyed() {