Add social media card to the docs

[esden]

Add social media card to the docs

[whitequark]

We can start with something like this (taken from CrowdSupply markup):

  <meta property="og:type" content="website">
  <meta property="og:url" content="https://www.crowdsupply.com/1bitsquared/glasgow">
  <meta property="og:description" content="A highly capable and extremely flexible open source multitool for digital electronics">
  <meta property="og:title" content="Glasgow Interface Explorer">
  <meta property="og:site_name" content="Crowd Supply">
    <meta property="og:image" content="https://www.crowdsupply.com/img/f9a9/glasgow-revc2_jpg_open-graph.jpg">
    <meta property="og:image:alt" content="">
  <meta property="fb:app_id" content="486081341457683">

  
  <meta name="twitter:card" content="summary_large_image">
  <meta name="twitter:site" content="@crowd_supply">
  <meta name="twitter:creator" content="@esden">
  <meta name="twitter:title" content="Glasgow Interface Explorer">
  <meta name="twitter:description" content="A highly capable and extremely flexible open source multitool for digital electronics">
    <meta name="twitter:image" content="https://www.crowdsupply.com/img/f9a9/glasgow-revc2_jpg_project-main.jpg">
    <meta name="twitter:image:alt" content="">