Add open graph meta tag

Author: majecty

public/images/og_image.png

@@ -5,6 +5,13 @@ html
     meta(charset="utf-8")
     meta(name="viewport", content="width=device-width, initial-scale=1")
     link(rel="icon", type="image/png", href="/faucet/favicon.png")
+    meta(name='twitter:card', content='summary_large_image')
+    meta(property='og:url', content='https://husky.codechain.io/faucet')
+    meta(property='og:title', content='Faucet For Husky')
+    meta(property='og:description', content='Get CCC for the Husky test network')
+    meta(property='og:image', content='https://husky.codechain.io/faucet/images/og_image.png')
+    meta(property="og:image:width", content="1200")
+    meta(property="og:image:height", content="630")
 
     script(src="/faucet/javascripts/lib/jquery-3.3.1.js")
     script(src="/faucet/javascripts/lib/bootstrap.bundle.min.js")