Add Github page challenge setting & update contact information

domains/_github-pages-challenge-rolandvonrotz.rotzloch.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "rolandvonrotz",
+        "discord": "rotzloch"
+    },
+    "records": {
+        "TXT": "4c2b8a5176d8cf093d7a330d37ecfd"
+    }
+}

domains/rotzloch.json

@@ -1,6 +1,7 @@
 {
     "owner": {
-        "username": "rolandvonrotz"
+        "username": "rolandvonrotz",
+        "discord": "rotzloch"
     },
     "records": {
         "CNAME": "rolandvonrotz.github.io"