fix: Cleanup code to follow good practice

Add line in verify mesage mentioning the ability to set the record onchain

shaker.py

@@ -11,8 +11,11 @@ load_dotenv()
 
 resolver = dns.resolver.Resolver()
 serverIP = os.getenv('DNS_SERVER')
+if not serverIP:
+    print("No DNS_SERVER found in .env")
+    exit(1)
 resolver.nameservers = [serverIP]
-resolver.port = int(os.getenv('DNS_PORT'))
+resolver.port = int(os.getenv('DNS_PORT',"53"))
 
 LOCAL = False
 if os.getenv('LOCAL') == "True":