Add Support for Custom Generic Docker Arguments for Instances

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Feature Description

When setting up an instance, there is currently no way that I'm aware of to add custom Docker arguments to the container that will be created, only the exposed parameters like container memory/image/bindings. By having these available it would provide the flexibility to configure arguments like capabilities, network modes, and environment variables for a specific instance, making it easier to tweak things like connecting AMP/Non-AMP containers to the same Docker network for example.