Kustomize, a tool built into Kubernetes, helped Alex handle different settings for different environments during a hectic deploy day at CloudSpeed.Alex, the newest DevOps engineer, had to deploy the app to development, staging, and production environments with different settings on the same day.Using Kustomize, Alex was able to create overlays for each environment, making it easy to manage and apply the necessary configuration changes.Kustomize saved the day for CloudSpeed by allowing seamless deploy to the required environments and ensuring a successful CEO demo in just four hours.