add open graph metadata so nice previews of confidential.ai are created in messaging apps like slack, telegram, whatsapp, etc

[gruns]

ie add and customize open graph elements, like this

<meta property='og:title' content='Your page title'>
<meta property='og:description' content='Short summary of the page'>
<meta property='og:image' content='https://example.com/image.png'>
<meta property='og:url' content='https://example.com/page'>
<meta property='og:type' content='website'>

to get a nice little preview instead of just this