Actually use the Dynu nameservers

domains/celesta.json

@@ -8,6 +8,6 @@
   "record": {
     "A": "37.101.98.55",
     "TXT": "v=spf1 a ~all",
-    "NS": ["paislee.ns.cloudflare.com", "salvador.ns.cloudflare.com"]
+    "NS": ["ns1.dynu.com", "ns11.dynu.com", "ns8.dynu.com"]
   }
 }