Shogo worked on the traPortfolio-UI repository, focusing on enhancing the Docker build configuration by standardizing instruction casing within a multistage Dockerfile. By updating the syntax from 'as build' to 'AS build', Shogo improved readability and ensured alignment with Docker best practices, which helps reduce confusion for future maintainers and supports more reliable CI/CD processes. The work centered on containerization and DevOps, utilizing Dockerfile as the primary language. While the scope was limited to a single feature and did not involve bug fixes, the change contributed to codebase consistency and maintainability, reflecting attention to detail in infrastructure engineering tasks.