Set canonical URL (#556)

* Set canonical URL

* Update canonical URL in config file

Author: dan-lee

zudoku.config.tsx

@@ -6,6 +6,7 @@ import { HeadNavigation } from "./src/HeadNavigation";
 
 const config: ZudokuConfig = {
   basePath: "/docs",
+  canonicalUrlOrigin: "https://zuplo.com",
   cdnUrl: {
     media: "https://cdn.zuplo.com/docs",
   },