Add facet filters

Author: rigor789

src/main.js

@@ -18,12 +18,13 @@ document.addEventListener('DOMContentLoaded', () => {
     mounted() {
       const selector = document.querySelector('.docSearch-input')
       const lang = document.documentElement.lang || 'en'
+      const [version] = window.location.hostname.match(/v\d-\d-\d/) || ['master']
 
       docsearch({
         apiKey: '31f842779e5b33726ec73f8f973b2202',
         indexName: 'nativescript-vue',
         inputSelector: selector,
-        algoliaOptions: {facetFilters: [`lang:${lang}`]},
+        algoliaOptions: {facetFilters: [`lang:${lang}`, `version:${version}`]},
         debug: false
       })
     },