What is a common application development use case for Docker?

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Creating isolated environments for project dependencies is a fundamental use case for Docker in application development. Docker allows developers to encapsulate their applications and all the necessary dependencies within container images. Each container can have its specific configuration, libraries, and runtime versions, ensuring that the application runs consistently across different environments, such as development, testing, and production.

By using Docker, teams can avoid the "it works on my machine" problem, as each developer can work in a contained setup that is identical to their peers' environments. This isolation not only enhances collaboration among team members but also simplifies dependency management, allowing developers to focus on building and maintaining the application rather than navigating conflicts between dependencies on their local systems.

The other options, while relevant to software development, do not highlight the primary application development use case for Docker. For instance, creating larger codebases is not a direct advantage of using Docker; rather, it can handle codebases of varying sizes. Running multiple instances of a database may utilize Docker, but it does not capture the core benefit of isolation for setup. Likewise, developing for different operating systems can be supported by Docker, but the key feature that most aligns with its purpose is the ability to create isolated environments, making project dependencies manageable and consistent.

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