Update neon.json

Add improvmx for email alias

domains/neon.json

@@ -6,7 +6,17 @@
         "discord": "GoodBoyNeon#2424",
         "email": ""
     },
+
     "record": {
-        "CNAME": "goodboyneon.github.io"
+        "MX": [
+          "mx1.improvmx.com",
+          "mx2.improvmx.com"
+        ],
+        "A": [
+          185.199.108.153
+          185.199.109.153
+          185.199.110.153
+          185.199.111.153
+        ]
     }
 }