Worked on the lfnovo/open-notebook repository to enhance the security and maintainability of its Dockerized infrastructure. Addressed the end-of-life status of existing dependencies by upgrading all Docker base images from Debian Bookworm to Debian Trixie and updating the Node.js runtime from version 20.x to 22.x. Focused on infrastructure as code practices, ensuring that all changes were confined to Dockerfile and runtime configurations without altering application logic, thereby minimizing the risk of regressions. Maintained full traceability through precise commit documentation, enabling efficient rollback if necessary. Demonstrated expertise in Docker, Debian, and Node.js while prioritizing deployment stability and lifecycle management.