validations: adds restrictions to allowed subdomain names

utils/invalid-domains.json

@@ -0,0 +1,12 @@
+[
+  "help",
+  "support",
+  "no-reply",
+  "noreply",
+  "notifications",
+  "notification",
+  "ww1",
+  "ww2",
+  "ww3",
+  "ww4"
+]

utils/validations.js

@@ -1,6 +1,7 @@
 const R = require('ramda');
 const { VALID_RECORD_TYPES } = require('./constants');
 const { or, and, validate, between, testRegex, withLengthEq, withLengthGte } = require('./helpers');
+const INVALID_NAMES = require('./invalid-domains.json');
 
 const isValidURL = testRegex(/^https?:\/\//ig);
 
@@ -41,6 +42,7 @@ const validateDomainData = validate({
       and([
         R.compose(between(2, 100), R.length),
         testRegex(/^[a-z0-9-]+$/g),
+        R.complement(R.includes(R.__, INVALID_NAMES)),
       ])
     ]),
   },