feat: search engine config for search bar without javascript

src/components/Search.astro

@@ -1,13 +1,26 @@
 ---
 import {siteConfig} from "../config";
 const noscript = siteConfig.noClientJavaScript
+const searchEngine = siteConfig.searchEngine || 'google'
+const domain = Astro.url.host
 ---
 {noscript ?
-<form class="search-container" action="https://www.google.com/search" method="GET" target="_blank">
+<form class="search-container" action={searchEngine === "duckduckgo" ? "https://duckduckgo.com/" :
+    searchEngine === "bing" ? "https://www.bing.com/search" :
+        "https://www.google.com/search"} method="GET" target="_blank">
   <div>
     <label for="search-input"><span class="command">search</span></label>
     <input name="q" type="text" id="search-input" class="search-input"  autocomplete="off" placeholder="Type to search..." />
-    <input type="hidden" name="as_sitesearch" value={Astro.url.host} />
+    {searchEngine === "duckduckgo" &&
+        <input type="hidden" name="sites" value={domain} />
+    }
+    {searchEngine === "google" &&
+        <input type="hidden" name="as_sitesearch" value={domain} />
+    }
+    {/* broken until M1cr0$0ft get support for it */}
+    {searchEngine === "bing" &&
+        <input type="hidden" name="site" value={domain} />
+    }
   </div>
   <input type="submit" style="display: none" />
 </form>