build methods to return site map url and site root url

services/PlaywrightService.js

@@ -12,7 +12,16 @@ class PlaywrightService {
     // constructor
     constructor(domain) {
         this.#domain = domain;
-        this.#url = `https://${domain}`;
+    }
+
+    // get sitemap url for the this domain
+    sitemapUrl() {
+        return `${this.rootUrl()}/sitemap.xml`;
+    }
+
+    // get the url of the site to be tested
+    rootUrl() {
+        return `https://${domain}`;
     }
 
     /**