collection-crud/config/packages/prod/monolog.php

<?php declare(strict_types=1);

use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;

return static function (ContainerConfigurator $containerConfigurator): void {
	$containerConfigurator->extension('monolog', [
		'handlers' => [
			'main' => [
				'type' => 'fingers_crossed',
				'action_level' => 'error',
				'handler' => 'nested',
				'excluded_404s' => ['^/'],
			],
			'nested' => [
				'type' => 'stream',
				'path' => '%kernel.logs_dir%/%kernel.environment%.log',
				'level' => 'debug',
			],
			'console' => [
				'type' => 'console',
				'process_psr_3_messages' => FALSE,
				'channels' => ['!event', '!doctrine'],
			],
		],
	]);
};