Assuming you have some sort of control over the root index.html file, write the appropriate `meta` tags in the header there. This article is old, but has a good

Assuming you have some sort of control over the root index.html file, write the appropriate `meta` tags in the header there. This article is old, but has a good, illustrated view of what tags do what. https://medium.com/slack-developer-blog/everything-you-ever-wanted-to-know-about-unfurling-but-were-afraid-to-ask-or-how-to-make-your-e64b4bb9254 https://medium.com/slack-developer-blog/everything-you-ever-...