Application dependencies should never be implicitly inherited from the system they run on. Each application should explicitly define the dependencies and versions used to build the application. This removes the tight coupling that may have been needed in legacy apps where they host system must have the right dependencies installed prior to the application be deployed.
When decomposing a monolithic application, containers are often used instead of a virtual machine to reduce the resource overhead. Containers also are easily restarted, aiding with disposability, and are easily scalable.
