Hide warning caused by skipping permissions hardening (#28)

Author: phenaproxima

settings.local.php

@@ -9,3 +9,7 @@
 );
 // Make it easier for Project Browser to install things into the local site.
 $settings['skip_permissions_hardening'] = TRUE;
+
+// Suppress the warning raised by `skip_permissions_hardening`.
+// @see drupal_cms_installer_install_tasks()
+putenv('IS_DDEV_PROJECT=1');