How make a photo page but when page link send in chat become a photo

I made a page with PHP and HTML, the output of which is a picture, the picture is displayed correctly in the browser, but when I send the page link in a platform like Discord, it does not appear as a picture, it is just a link. How can I make it so that when the page link is sent in Discord, it becomes a photo and the photo that is on the page is displayed. Like Tanor.com