DOC-4344: Add Algolia site keys to playbooks (#121)

* Replace Algolia config values with playbook variables

* Conditionally load the DocsSearch script

src/partials/body-end-scripts.hbs

@@ -4,13 +4,17 @@
 <script async src="{{{uiRootPath}}}/js/vendor/zooming.js"></script>
 
 <script src="https://cdn.jsdelivr.net/npm/@docsearch/js@3"></script>
+{{#with site.keys}}
+  {{#if (and algoliaAppId algoliaIndexName algoliaApiKey)}}
 <script>
   docsearch({
     container: '#docsearch',
-    appId: '2ELPRZR9UC',
-    indexName: 'crawler_docsearch-astra',
+    appId: '{{algoliaAppId}}',
+    indexName: '{{algoliaIndexName}}',
     {{!-- This is the public API key which can be safely used in frontend code. --}}
-    apiKey: '1f4acbf51d118e4137e9a63b38bd8456',
+    apiKey: '{{algoliaApiKey}}',
   })
 </script>
+  {{/if}}
+{{/with}}
 {{> intercom}}