Your GitLab CE pipeline has three stages: 'render', 'validate', and 'deploy'. In the 'render' stage, a job runs a Jinja2 script that produces device configuration files under ./build/configs/. The 'validate' and 'deploy' jobs in later stages fail because ./build/configs/ is empty when they run — each job starts with a clean checkout of the repository. What is the correct way to make the rendered files available to the downstream jobs?