Worked on the suitenumerique/people repository to deliver a focused upgrade of the Dimail service, emphasizing data integrity and future scalability. The project involved updating the Docker image tag in the docker-compose.yml file to deploy version v0.1.1, ensuring a smooth and controlled rollout. During this process, the approach preserved the 'uuid' field in mailbox_data serialization, maintaining identifier continuity for downstream systems. The work demonstrated careful version control and adherence to CI/CD practices, with clear documentation throughout. Utilizing Python and YAML for backend development and container orchestration, the upgrade reduced deployment risk and laid groundwork for future enhancements to the service.