fix(puppets): added wait until networkidle opt for remote html input

Added wait until networkidle0 option for loading a remote html input to prevent race conditions of
loading the input and taking the screenshots

fix #125

src/helpers/puppets.ts

@@ -270,7 +270,7 @@ const saveImages = async (
         await page.setViewport({ width, height });
 
         if (address) {
-          await page.goto(address);
+          await page.goto(address, { waitUntil: 'networkidle0' });
         } else {
           await page.setContent(shellHtml);
         }