Add myst.json with domain owner and records

domains/myst.json

@@ -0,0 +1,9 @@
+{
+  "owner": {
+    "username": "ExcessByte",
+    "email": "ericdenny26@gmail.com"
+  },
+  "records": {
+    "URL": "https://byte.is-a.dev"
+  }
+}