During April 2025, Daniel Semkowicz focused on stabilizing container deployment for the DivinumOfficium/divinum-officium repository by addressing SELinux-related permission issues in Docker environments. He updated the docker-compose.yml configuration using YAML to implement SELinux-aware volume mounts, specifically adding the :Z relabeling option. This technical approach ensured correct file labeling on SELinux-enabled systems, effectively reducing permission-denied runtime errors without disrupting deployments on other platforms. Leveraging his skills in DevOps, Docker, and SELinux, Daniel’s work improved cross-environment consistency and deployment reliability. The solution reduced support overhead and runtime failures, demonstrating a thoughtful, targeted fix to a nuanced containerization challenge.