This case study examines the optimization of Capture the Flag (CTF) events, which are crucial for cybersecurity training, using open-source technologies. We explore the complexities involved in organizing these events, from the initial deployment to ongoing support, focusing on challenges such as container and log management, continuous integration and deployment (CI/CD), resource allocation, and securing challenge instances. Our unique contribution is a system that leverages modern open-source technologies to address these challenges. We highlight the advantages of our system compared to traditional solutions, emphasizing its efficiency, scalability, and ability to enhance the participant experience. The paper concludes with a discussion on the future of CTF event optimization, highlighting the need for further research and development in this field.