emails/ui/public/index.php

<?php
$app = require_once implode(DIRECTORY_SEPARATOR, [
    dirname(__FILE__, 2),
    'setup',
    'app.php'
]);
Monolog\ErrorHandler::register($app->getContainer()->get(Psr\Log\LoggerInterface::class));
try {
    $app->run();
} catch (Error | Exception $e) {
    $logger = $app->getContainer()->get(Psr\Log\LoggerInterface::class);
    if (isset($_REQUEST)) {
        $logger->debug(Safe\json_encode(compact('_REQUEST')));
    }
    $logger->debug(Safe\json_encode(compact('_SERVER')));
    $logger->error($e);
    throw $e;
}