During July 2025, Feycot focused on configuration management within the hexlet-basics/hexlet-basics repository, addressing a critical issue with Docker image registry paths for exercise environments. By updating the docker_image attribute in YAML configuration files, Feycot ensured that exercises now pull images from ghcr.io/hexlet-basics/exercises-javascript instead of the outdated registry. This change maintained consistency across development and production environments, reducing potential deployment errors. The work, linked to a specific commit for traceability, demonstrated attention to reproducibility and environment alignment. While the scope was limited to a single bug fix, the solution reflected a solid understanding of Docker and YAML-based configuration management.