Fixed and improved social share urls and open graph images (#23)

Author: lmammino

views/_layout.pug

@@ -19,13 +19,13 @@ html(lang=meta.lang prefix="og: http://ogp.me/ns#")
     meta(property="og:site_name" content=meta.title)
     meta(property="og:type" content="website")
     meta(property="og:url" content=meta.canonicalUrl)
-    meta(property="og:image" content="/images/share-banner-facebook.jpg")
+    meta(property="og:image" content=`${meta.canonicalUrl}/images/share-banner-facebook.jpg`)
     meta(property="og:locale" content=meta.locale)
     meta(property="twitter:card" content="website")
     meta(property="twitter:site" content=meta.twitterProfile)
     meta(property="twitter:title" content=meta.title)
     meta(property="twitter:description" content=meta.description)
-    meta(property="twitter:image" content="/images/share-banner-twitter.jpg")
+    meta(property="twitter:image" content=`${meta.canonicalUrl}/images/share-banner-twitter.jpg`)
 
     link(rel="canonical" href=meta.canonicalUrl)
     link(rel="apple-touch-icon" sizes="57x57" href="/apple-icon-57x57.png")

views/components/_social-share.pug

@@ -1,23 +1,23 @@
 mixin social-share(link, title)
   - var url = `https://fullstackbulletin.com/${link}`;
-  - var twitterSharePageUrl = `https://twitter.com/intent/tweet/?text=${title}&url=${url}`
+  - var twitterSharePageUrl = `https://twitter.com/intent/tweet/?text=${title}&url=${url}&via=fstackbulletin`
   - var facebookSharePageUrl = `https://facebook.com/sharer/sharer.php?u=${url}`;
-  - var linkedinSharePageUrl = `https://www.linkedin.com/shareArticle?mini=true&url=${url}&title=${title}&summary=${title}&source=Focus+Risparmio`;
+  - var linkedinSharePageUrl = `https://www.linkedin.com/shareArticle?mini=true&url=${url}&title=${title}&summary=${title}&source=Fullstack+Bulletin`;
 
   .social-share
     .social-share__list
       .social-share__item
-        a.social-share__link(href=facebookSharePageUrl)
+        a.social-share__link(href=facebookSharePageUrl target="_blank")
           .social-share__icon
             +icon({name: "facebook"})
           .social-share__text Facebook
       .social-share__item
-        a.social-share__link(href=twitterSharePageUrl)
+        a.social-share__link(href=twitterSharePageUrl target="_blank")
           .social-share__icon
             +icon({name: "twitter"})
           .social-share__text Twitter
       .social-share__item
-        a.social-share__link.social-share__link--linkedin(href=linkedinSharePageUrl)
+        a.social-share__link.social-share__link--linkedin(href=linkedinSharePageUrl target="_blank")
           .social-share__icon
             +icon({name: "linkedin"})
           .social-share__text Linkedin