Create a Personalization Product (embroidery)

1. Create new product or update existing product in Shopify Admin
2. add the tag “embroidery”
3. Upload preview image to the Shopify FILES area of the Admin panel
   Image should be square - 1024x1024
4. On the product, add the following metafield:
   embroidery.preview = filename of preview image (file.jpg)
   [OPT] embroidery.position = css position of the text elements [Example: top: 66%;left: 43%;transform: translate(-50%,-50%);]