Drupal 8 basic settings file (for development)

settings.php

<?php
assert_options(ASSERT_ACTIVE, TRUE);
\Drupal\Component\Assertion\Handle::register();

$databases = [
  'default' => [
    'default' => [
      'driver' => 'mysql',
      'database' => '',
      'username' => '',
      'password' => '',
      'host' => 'localhost',
      'prefix' => '',
    ],
  ],
];

// $config_directories = [];
$settings['hash_salt'] = '';
$settings['update_free_access'] = FALSE;

// services
$settings['container_yamls'][] = __DIR__ . '/services.yml';
$settings['container_yamls'][] = DRUPAL_ROOT . '/sites/development.services.yml';

$settings['trusted_host_patterns'] = [
  '^localhost$',
  '^dev$',
];

// $settings['install_profile'] = '';
// $config_directories['sync'] = '';

$config['system.file']['path.temporary'] = '/tmp';
$settings['file_private_path'] = 'private';

/**
 * Disable CSS and JS aggregation.
 */
$config['system.performance']['css']['preprocess'] = FALSE;
$config['system.performance']['js']['preprocess'] = FALSE;

// disable caching
$settings['cache']['bins']['dynamic_page_cache'] = 'cache.backend.null';
$settings['cache']['bins']['render'] = 'cache.backend.null';

// enable verbose errors
$config['system.logging']['error_level'] = 'verbose';

$config['devel.settings']['devel_dumper'] = 'kint';
$settings['devel.settings']['devel_dumper'] = 'kint';
if (file_exists(DRUPAL_ROOT . '/modules/contrib/devel/kint/kint/Kint.class.php')) {
  $settings['devel.devel_dumper'] = 'kint';
  $config['devel.devel_dumper'] = 'kint';
  require_once DRUPAL_ROOT . '/modules/contrib/devel/kint/kint/Kint.class.php';
  Kint::$maxLevels = 6;
}