Define public, private and temporary path for Drupal 8 sites

templates/d8_settings.php

@@ -32,4 +32,9 @@ $databases = array (
 $settings['update_free_access'] = FALSE;
 $settings['container_yamls'][] = __DIR__ . '/services.yml';
 $settings['install_profile'] = 'standard';
+$settings['file_public_path'] = 'sites/{{ item.shortname|default("default") }}/files';
+$settings['file_private_path'] = 'sites/{{ item.shortname|default("default") }}/private';
+
+$config['system.file']['path.temporary'] = '{% if drupal.jail is defined %}{{ jailroot }}/{{ drupal.jail.name }}{% endif %}/tmp';
+
 $config_directories['sync'] = 'sites/{{ item.shortname|default("default") }}/files/{{ item.config }}/sync';