In March 2026, Juan Menéndez enhanced the rails/rails repository by introducing Docker image build flexibility tailored for Corepack-based package management. He updated the Dockerfile to conditionally support either immutable or frozen-lockfile modes, depending on Corepack usage, which improved the reliability and reproducibility of dependency installation during Docker-based Rails builds. This approach addressed variability caused by differing lockfile states and aligned the build process with modern Yarn and Corepack practices. Juan utilized Ruby, Shell scripting, and Docker, demonstrating a focused application of dependency management skills. The work was targeted, addressing a nuanced CI/CD challenge with a well-scoped technical solution.