Noel Da Costa focused on improving deployment reliability for the zotonic/zotonic repository by addressing configuration hygiene within the project’s Docker Compose setup. He identified and removed the deprecated 'version' key from the docker-compose.yml file, aligning the configuration with current Docker Compose standards and reducing the risk of deployment warnings or errors. This work, carried out using YAML and leveraging his DevOps and Docker expertise, ensured smoother orchestration across different environments. While the scope of changes was targeted, the update addressed a critical aspect of infrastructure maintenance, reflecting a careful approach to keeping deployment processes up to date and robust.