BookStack/app/Config/queue.php

<?php

/**
 * Queue configuration options.
 *
 * Changes to these config files are not supported by BookStack and may break upon updates.
 * Configuration should be altered via the `.env` file or environment variables.
 * Do not edit this file unless you're happy to maintain any changes yourself.
 */

return [

    // Default driver to use for the queue
    // Options: null, sync, redis
    'default' => env('QUEUE_CONNECTION', 'sync'),

    // Queue connection configuration
    'connections' => [

        'sync' => [
            'driver' => 'sync',
        ],

        'database' => [
            'driver' => 'database',
            'table' => 'jobs',
            'queue' => 'default',
            'expire' => 60,
        ],

        'beanstalkd' => [
            'driver' => 'beanstalkd',
            'host'   => 'localhost',
            'queue'  => 'default',
            'ttr'    => 60,
        ],

        'sqs' => [
            'driver' => 'sqs',
            'key'    => 'your-public-key',
            'secret' => 'your-secret-key',
            'queue'  => 'your-queue-url',
            'region' => 'us-east-1',
        ],

        'iron' => [
            'driver'  => 'iron',
            'host'    => 'mq-aws-us-east-1.iron.io',
            'token'   => 'your-token',
            'project' => 'your-project-id',
            'queue'   => 'your-queue-name',
            'encrypt' => true,
        ],

        'redis' => [
            'driver' => 'redis',
            'connection' => 'default',
            'queue'  => 'default',
            'expire' => 60,
        ],

    ],

    // Failed queue job logging
    'failed' => [
        'database' => 'mysql', 'table' => 'failed_jobs',
    ],

];