Starting from the basics of Docker and building a practical CI/CD pipeline, I gained a clear understanding of the point where development and operations converge. Beyond simple deployment automation, I was able to learn from a practical perspective how to integrate security into each stage of the pipeline from a DevSecOps standpoint. Through the process of optimizing container images, managing environment-specific configurations, and automating vulnerability scanning, I learned how to build more robust systems. I was able to develop a balanced set of technical skills necessary for managing infrastructure as code and releasing services reliably.