What aspect of Docker contributes to environment consistency?

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Uniform packaging of applications with dependencies is crucial for achieving environment consistency in Docker. Docker encapsulates an application and its required libraries and dependencies into a single artifact known as a container image. This approach ensures that the application behaves the same way regardless of where it is deployed—whether it's on a developer's local machine, a testing server, or a production environment.

The uniformity of the container image means that developers can avoid issues related to differing environments, such as different library versions or configuration settings that could lead to unexpected behaviors. This packaging ensures that the same environment can be replicated consistently across various stages of the development lifecycle.

In contrast to this, lightweight virtual machines do not provide the same level of consistency since VM configurations can differ widely based on the virtualization infrastructure. Static resource allocation does not directly address how application dependencies are handled and can lead to inconsistencies if resources are not correctly provisioned. Multiple manual configurations per environment introduce variability and increase the risk of discrepancies, undermining the goal of a consistent deployment environment.

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