Google analytics

Adds Open graph meta tags for index.html.

<!-- Facebook Meta Tags -->
<!-- <meta property="og:url" content="" /> -->
<meta property="og:type" content="website" />
<meta property="og:title" content="-og:title-" />
<meta property="og:description" content="description" />
<meta property="og:image" content="image" />

<!-- Twitter Meta Tags -->
<meta name="twitter:card" content="image" />
<meta property="twitter:domain" content="" />
<!-- <meta property="twitter:url" content="" /> -->
<meta name="twitter:title" content="-twitter:title-" />
<meta name="twitter:description" content="" />
<meta name="twitter:image" content="images" />

You should set your meta tags values.