fix: support new vercel style

api/services/dns/[query].ts

@@ -0,0 +1,34 @@
+import dns from 'dns';
+import {send, sendError} from '../../../util/http';
+import {NowRequest, NowResponse} from '@vercel/node';
+
+function resolvePromise(hostname: string): Promise<string[]> {
+  return new Promise((resolve, reject) => {
+    dns.resolve4(hostname, function (err, addresses) {
+      if (err) return reject(err);
+      resolve(addresses);
+    });
+  });
+}
+
+export default async function handler(
+  req: NowRequest,
+  res: NowResponse,
+): Promise<void> {
+  const {query} = req.query;
+
+  if (!query || typeof query !== 'string') {
+    return sendError(res, new Error('No query given'));
+  }
+
+  try {
+    const response = await resolvePromise(query);
+    const availability = response && response.length > 0 ? false : true;
+    send(res, {availability});
+  } catch (err) {
+    if (err.code === 'ENODATA' || err.code === 'ENOTFOUND') {
+      return send(res, {availability: true});
+    }
+    sendError(res, err);
+  }
+}