Fix Lighthouse Compliance (#44)

* fix: add https to external sources and doctype to renderer

* fix: reverse https, fix doctype in renderer

packages/cli/lib/util/renderer.js

@@ -46,7 +46,7 @@ class Renderer {
       return { status: 400, content: '' };
     }
     // Serialize page.
-    const result = await page.evaluate('document.firstElementChild.outerHTML');
+    const result = await page.content();
 
     await page.close();