Add fontjoy resource to design

resources/design.json

@@ -139,6 +139,11 @@
       "desc": "Codrops is a web design and development blog that publishes articles and tutorials about the latest web trends, techniques and new possibilities.",
       "url": "https://tympanus.net/codrops/",
       "tags": []
+    },
+    {
+      "title": "Fontjoy",
+      "desc": "Generate font combinations with deep learning.",
+      "url": "https://fontjoy.com/"
     }
   ]
 }