Worked on the RocketChat/EmbeddedChat repository to deliver a security-focused infrastructure enhancement by upgrading the MongoDB image in the docker-compose configuration. This update ensured that the deployment benefits from the latest security patches and new MongoDB features, reducing vulnerability exposure and supporting compliance requirements. The work involved hands-on use of Docker, containerization best practices, and YAML for configuration management. By aligning the stack with current security standards, the upgrade facilitated smoother future maintenance and minimized deployment risks. No bugs were addressed during this period, but the targeted feature improved operational stability and positioned the project for easier ongoing upgrades.