#concrete5 config file for local environment

valet.app.php

<?php
/**
 * Set default value for curl option
 */
return [
    'http_client' => [
        'connecttimeout' => 30,
    ],
];

valet.concrete.php

<?php
/**
 * Enable debug display
 * Disable email, marketplace, external access, session invalidate, help overlay
 */

return [
    'accessibility' => [
        'display_help_system' => false,
    ],
    'debug' => [
        'display_errors' => true,
        /*
         * Site debug level
         *
         * @var string (message|debug)
         */
        'detail' => 'debug',
    ],
    'email' => [
        'enabled' => false,
    ],
    'external' => [
        'intelligent_search_help' => false,
        'news' => false,
    ],
    'marketplace' => [
        'enabled' => false,
    ],
    'security' => [
        'session' => [
            'invalidate_on_user_agent_mismatch' => false,
            'invalidate_on_ip_mismatch' => false,
        ],
    ],
    'updates' => [
        'skip_core' => true,
    ],
];

Download valet.app.php and valet.concrete.php into your application/config/ directory.
"valet" is the name of the environment. If you don't use valet, please follow this documentation to separate config files between environments.