Create landing.js

This changes the Skin/Avatar server displayed on the landing page to one that displays the hat layer which then features the skin correctly.

app/assets/js/scripts/landing.js

@@ -130,7 +130,7 @@ function updateSelectedAccount(authUser){
             username = authUser.displayName
         }
         if(authUser.uuid != null){
-            document.getElementById('avatarContainer').style.backgroundImage = `url('https://mc-heads.net/body/$npm{authUser.uuid}/right')`
+            document.getElementById('avatarContainer').style.backgroundImage = `url('https://mc-heads.net/body/${authUser.uuid}/right')`
         }
     }
     user_text.innerHTML = username