Emil Arnes worked on enhancing the CI/CD pipeline for the felleslosninger/github-workflows repository, focusing on improving Docker image build reliability for Quarkus and Spring Boot workflows. He consolidated updates to builder versions and introduced a parameterized image-pack-tag, enabling more flexible versioning of Docker image packs. By updating the image-pack to the latest release, Emil addressed regressions and improved overall pipeline stability. His work leveraged YAML for workflow configuration and utilized technologies such as Docker and GitHub Actions. The changes provided a more robust and adaptable CI/CD process, though the scope was limited to a single feature over one month.