migrate to "export default"

also, set no-use-before-define in linter

src/routes/mailserver.js

@@ -5,20 +5,12 @@ import debugModule from 'debug';
 import http from 'node:http';
 import { HttpError } from '@cloudron/connect-lastmile';
 import { HttpSuccess } from '@cloudron/connect-lastmile';
-import * as mailServer from '../mailserver.js';
+import mailServer from '../mailserver.js';
 import safe from 'safetydance';
 import services from '../services.js';
 
 const debug = debugModule('box:routes/mailserver');
 
-export {
-    proxy,
-    proxyAndRestart,
-    queueProxy,
-
-    setLocation,
-    getLocation
-};
 
 async function proxyToMailContainer(port, pathname, req, res, next) {
     req.clearTimeout();
@@ -95,3 +87,12 @@ async function setLocation(req, res, next) {
 
     next(new HttpSuccess(202, { taskId }));
 }
+
+export default {
+    proxy,
+    proxyAndRestart,
+    queueProxy,
+
+    setLocation,
+    getLocation
+};