docs: fix search in reference (#1971)

www/reference/gatsby-config.js

@@ -64,6 +64,7 @@ module.exports = {
       resolve: `gatsby-plugin-env-variables`,
       options: {
         allowList: ["ALGOLIA_API_KEY"],
+        allowList: ["ALGOLIA_APP_ID"],
       },
     },
     {

www/reference/src/components/search/index.js

@@ -9,6 +9,7 @@ import { convertToKebabCase } from "../../utils/convert-to-kebab-case"
 import { navigate } from "gatsby-link"
 
 const algoliaApiKey = process.env.ALGOLIA_API_KEY || "temp"
+const algoliaAppId = process.env.ALGOLIA_APP_ID || "temp"
 
 const Search = ({data}) => {
   const { goTo, api } = useContext(NavigationContext)
@@ -72,6 +73,7 @@ const Search = ({data}) => {
   return (
     <DocSearch
       apiKey={algoliaApiKey}
+      appId={algoliaAppId}
       indexName="medusa-commerce"
       hitComponent={({hit, children}) => <HitComponent data={data} hit={hit} children={children} />}
       navigator={{