No suitable servers found (`serverSelectionTryOnce` set): [Failed to resolve 'localhost']<br><pre>#0 /srv/http/dynamic/rankings/vendor/mongodb/mongodb/src/Collection.php(546): MongoDB\Driver\Manager->selectServer()
#1 /srv/http/dynamic/rankings/app/controllers/DisplayController.php(17): MongoDB\Collection->findOne()
#2 [internal function]: DisplayController->embedAction()
#3 [internal function]: Phalcon\Dispatcher\AbstractDispatcher->callActionMethod()
#4 [internal function]: Phalcon\Dispatcher\AbstractDispatcher->dispatch()
#5 /srv/http/dynamic/rankings/public/index.php(72): Phalcon\Mvc\Application->handle()
#6 {main}</pre>