Developed a reproducible Docker-based development and testing environment for the BRP-API/brp-api-gezag repository, focusing on enabling consistent local development and automated testing. The work involved creating a Dockerfile, CI configuration, initialization scripts, and SQL seed data to provision a containerized PostgreSQL database. Integrated CI/CD pipelines ensured automated provisioning and validation, while dependency synchronization with BRP-API/brp-shared maintained cross-repository alignment. By delivering a stable, on-demand environment, the project reduced onboarding time and minimized environment drift. The implementation demonstrated skills in Docker, SQL, and database management, providing a reliable foundation for faster iteration and improved testing reliability within the repository.