FS permissions are a problem

Make sure that files can be written from host, the dev container and also inside the PHP container.

mentioned in commit composer/plugin/docker4drupal@4e905200

mentioned in commit gitlab-drupal-ci@638ea26f

Looks like we have that under control except for the Drupal code generator included in Drush. See https://github.com/drupal-code-builder/drupal-code-builder-drush/issues/9

unassigned @jurgenhaas

closed

mentioned in commit gitlab-drupal-ci@8077501f