Worked on stabilizing the core CI pipeline and hardening deployment for the lnbits/lnbits repository, focusing on reliability and security improvements. Addressed a critical issue by re-enabling and correcting Nix Flake CI checks, updating the flake.nix structure to import tests from a new location, and ensuring test definitions properly passed the flake object. Enhanced deployment by configuring the lnbits service to disable the Admin UI while maintaining webserver accessibility, thereby reducing the attack surface and improving operational reliability. Utilized Nix, CI/CD practices, and testing methodologies to deliver targeted improvements within a short timeframe, emphasizing robust release and runtime environments.