During November 2024, Dulith Sasin focused on enhancing the Docker build process for the puppeteer/puppeteer repository. He refactored the Dockerfile to standardize the use of a numeric user ID for the pptruser, introducing the PPTRUSER_UID variable and ensuring it was applied consistently during user creation and switching. This DevOps-driven change, implemented using Dockerfile and Shell scripting, addressed build-time flakiness and improved reproducibility across different environments. By clarifying container user identification, Dulith’s work simplified ongoing maintenance and contributed to more robust Docker images. The scope of work was targeted, with depth in containerization and user management best practices.