FontAwesome 5 changes

It seems like FontAwesome 5 requires you to specify the prefix of the specific icon.
https://fontawesome.com/how-to-use/svg-with-js#basic-use

config.sample.json

@@ -3,17 +3,17 @@
 	"items" : [
 		{
 			"alt" : "Github",
-			"icon" : "fa-github",
+			"icon" : "fab fa-github",
 			"link" : "https://github.com/Swagielka"
 		},
 		{
 			"alt" : "Twitter",
-			"icon" : "fa-twitter",
+			"icon" : "fab fa-twitter",
 			"link" : "https://twitter.com/Kukielka_"
 		},
 		{
 			"alt" : "Docker Hub",
-			"icon" : "fa-docker",
+			"icon" : "fab fa-docker",
 			"link" : "https://hub.docker.com/u/kukielka/"
 		}
 	]