clear the request timeout when adding/updating domain

DO API takes very long to respond at times :/ Currently, there is
no easy way to reset the timeout middleware timeout. We should add
this feature upstream (https://github.com/expressjs/timeout/issues/26)

src/server.js

@@ -60,7 +60,9 @@ function initializeExpressSync() {
     router.del = router.delete; // amend router.del for readability further on
 
     app
-        .use(middleware.timeout(REQUEST_TIMEOUT))
+        // the timeout middleware will respond with a 503. the request itself cannot be 'aborted' and will continue
+        // search for req.clearTimeout in route handlers to see places where this timeout is reset
+        .use(middleware.timeout(REQUEST_TIMEOUT, { respond: true }))
         .use(json)
         .use(urlencoded)
         .use(middleware.cookieParser())