How can Tracy prevent her development team from overwriting images in a Docker Trusted Registry?

Marking the repository as immutable is an effective way for Tracy to prevent her development team from overwriting images in a Docker Trusted Registry. An immutable repository ensures that once an image is pushed to the repository, it cannot be altered or deleted. This feature is particularly important in production environments where stability and reliability of container images are critical. By enforcing immutability, Tracy can ensure that all images used in deployment are consistent with the tested versions, thereby minimizing the risk of introducing changes or breaking changes accidentally.

Other methods, such as creating a dedicated namespace or enforcing a tagging convention, can help organize images and provide some level of control, but they do not inherently prevent overwriting of existing images. Regularly resetting the repository password may enhance security, but it won't stop team members from overwriting images they have permission to access. Thus, marking the repository as immutable is the most direct and effective solution for Tracy's requirement.