add subdomain check to selfserv

src/commands/cwg_selfserv.ts

@@ -20,6 +20,7 @@ export default class CWG_SelfService extends Command {
   }
 
   public async run(message: Message, args: string[]) {
+    if (!args[0].endsWith('.cloud.libraryofcode.org')) return this.error(message.channel, 'Only subdomains may be created with this command. If you\'d like to use a custom domain please contact a Technician.');
     const reqDomain = `${escape(args[0])}.cloud.libraryofcode.org`;
 
     try {