Add koperski.json with owner and records information

domains/koperski.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "wkoperski",
+        "email": "koperski.wojciech.06@gmail.com"
+    },
+    "records": {
+        "CNAME": "w-koperski.github.io"
+    }
+}