Streamlined `.drone.yml` by removing redundant test-and-jar step, introducing image caching with `cache_from`, and refining conditional triggers. Enhanced `Dockerfile` with multi-stage builds for dependency warming, test execution, and efficient package creation, alongside runtime optimizations for graceful shutdown and resource management.
Enhanced `.drone.yml` to enable Docker BuildKit for efficient builds and added support for Gradle cache persistence across runs. Introduced OCI-compliant image labels for traceability. Updated `.dockerignore` to exclude unnecessary files from Docker context.
Integrate JaCoCo to enforce and report test coverage with a minimum threshold of 65%. Update Drone CI configuration to use a new Docker registry (rubble.se:5000) and add support for authentication with secrets.
