docsearch meta tags

src/components/SEO.tsx

@@ -7,6 +7,7 @@
 import React, { StatelessComponent } from "react";
 import Helmet from "react-helmet";
 import { useStaticQuery, graphql } from "gatsby";
+import { getCurrentVersion } from '../utils/nodes';
 
 interface MetaProp {
   name: string,
@@ -71,6 +72,11 @@ const SEO: StatelessComponent<SEOProps> = ({ description, lang, meta, title }) =
         {
           name: `twitter:description`,
           content: metaDescription
+        },
+        {
+          name: `docsearch:version`,
+          content: getCurrentVersion(),
+
         }
       ].concat(meta)}
     />

src/components/SearchBox.tsx

@@ -1,6 +1,7 @@
 import React from 'react'
 import { StatelessComponent, ReactElement, useEffect } from 'react';
 import { navigateTo } from "gatsby-link"
+import { getCurrentVersion } from '../utils/nodes';
 
 interface SearchBoxProps {
   identifier: string;
@@ -26,13 +27,14 @@ const SearchBox: StatelessComponent<SearchBoxProps> = ({ identifier }): ReactEle
         );
         if(window.docsearch){
             window.docsearch({ 
+              algoliaOptions: {
+                facetFilters: [`version:${getCurrentVersion()}`],
+                hitsPerPage: 5,
+              },
               apiKey: process.env.GATSBY_DOCSEARCH_API_KEY, 
+              debug: true,
               indexName: process.env.GATSBY_DOCSEARCH_INDEX, 
               inputSelector: `#${identifier}`,
-              algoliaOptions: {
-                hitsPerPage: 5
-              },
-              debug: true
             });
           }