title: Can not set thumbnail for home page (it is also shop page) when sharing on Facebook
body: <p>My website use the shop page as the front page. I already set featured image for that page. 
  When I sharing the link of my shop page <a href="http://www.shopgiayhd.com/shop" rel="nofollow noreferrer">www.shopgiayhd.com/shop</a> I got the thumbnail as the featured image I set.
  But when I sharing my web link <a href="http://www.shopgiayhd.com" rel="nofollow noreferrer">www.shopgiayhd.com</a>, it uses the last product image as the thumbnail.</p>
  
  <p>I tried to add the meta property og:image at the <code>&lt;head&gt;...&lt;/head&gt;</code>. It works but it affects all other links such as category, single product. I don't want like that.</p>
  
  <p>Please help me. Thank you so much in advance</p>