Arne Arnested developed and delivered a local HTTPS development environment for the danskernesdigitalebibliotek/dpl-cms repository, introducing a Docker Compose service that enables secure connections and mirrors production networking in local workflows. This approach improved developer onboarding and testing fidelity by aligning local and production environments. In addition, Arne addressed codebase hygiene in the danskernesdigitalebibliotek/dpl-go repository by refactoring TypeScript definition files for WSI v5 user group queries, standardizing naming conventions to match class names and reduce confusion. Throughout the period, Arne demonstrated skills in DevOps, Docker, and TypeScript, focusing on maintainability and realistic development environments rather than user-facing features.