mobimo/support#2982 Re-configure mysql backup destination and add cron tab

src/Handler.php

@@ -245,9 +245,9 @@ class Handler extends BaseHandler {
         $traefik['usessl'] = 1;
         $traefik['ports'] = 443;
         if ($this->config->readValue(['backup', 'enable'])) {
-          $cron = $this->config->readValue('cron');
-          $cron['www-data'][] = '5 0 * * * cd /var/www/html && /usr/local/bin/drush sql:dump --result-file=/var/backups/mysql/drupal.sql';
-          $this->config->setValue('cron', $cron, FALSE);
+          $crontabs = $this->config->readValue('crontabs');
+          $crontabs['www-data'][] = '5 0 * * * cd /var/www/html && /usr/local/bin/drush sql:dump --result-file=/var/backups/mysql/drupal.sql';
+          $this->config->setValue('crontabs', $crontabs, FALSE);
         }
         $overwriteConfig = [
           'staging' => !in_array(getenv('PROJECT_BRANCH_SANITIZED'), ['master', 'main'], TRUE),