Worked on the puppeteer/puppeteer repository to enhance Docker image reliability by standardizing user identification within the build process. Refactored the Dockerfile to introduce and consistently apply a numeric user ID for the pptruser, addressing issues related to build-time flakiness and improving reproducibility across different environments. This approach clarified container user identification and simplified ongoing maintenance of Docker images. The work leveraged DevOps practices and utilized Dockerfile and Shell scripting to implement the changes. Over the course of the month, focused on this targeted feature, delivering a robust solution that streamlines Docker image builds and supports clearer, more predictable deployments.