During July 2025, Bernhard focused on enhancing the FlexMeasures/flexmeasures repository by implementing local PostgreSQL data persistence within Docker Compose environments. He addressed the challenge of data loss during container restarts by mounting a local directory for PostgreSQL storage, ensuring that developer data remains intact across sessions. This solution involved updates to the docker-compose.yml configuration, adjustments to the .gitignore file to exclude persistent data, and refinements to project documentation. Bernhard utilized his skills in Docker, PostgreSQL, and configuration management, delivering a targeted feature that improves developer experience and aligns with ongoing efforts to optimize database workflows in local development setups.