分享 Facebook 的時候 image 出不來
如果只是 website 的話，一個網站只能有一個 image ，除非你用 og:product
https://developers.facebook.com/docs/sharing/webmasters?locale=zh_TW
https://developers.facebook.com/docs/payments/product/
Properties
| Name | Required | Description |
|---|---|---|
og:type | ✓ | The value should be⭐️ og:product |
og:title | ✓ | Title of the product e.g. 'In Your Village Money'. |
og:url | ✓ | The unique URL of the product. |
og:description | ✓ | The description for this product. |
og:image | ✓ | The image which represents your product. The image should be 50px by 50px. We support PNG, JPEG and GIF formats. |
product:plural_title | ✗ | Title of the product when a quantity more than 1 is purchased. |
product:price:amount | ✓ if Static Pricing / ✗ if Dynamic Pricing | A decimal number with a '.' as the decimal separator. Values less than 0.01 are not supported. |
product:price:currency | ✓ if Static Pricing/ ✗ if Dynamic Pricing | Currency is a string representing the ISO-4217-3 currency code. |