chore(domains): add santana subdomain

domains/santana.json

@@ -0,0 +1,10 @@
+{
+  "owner": {
+    "username": "prenansantana",
+    "email": "renan@santana.is-a.dev"
+  },
+  "records": {
+    "MX": ["mx1.improvmx.com", "mx2.improvmx.com"],
+    "TXT": "v=spf1 include:spf.improvmx.com ~all"
+  }
+}