Add sa1.json configuration for domain owner and records

domains/sa1.json

@@ -0,0 +1,9 @@
+{
+  "owner": {
+    "username": "thesa1",
+    "email": "i@sa1.dev"
+  },
+  "records": {
+    "CNAME": "cname.vercel-dns.com"
+  }
+}