I would add in workers... is there something that should be run on a different system.. the typical example is image resizing. Even if a service will only be used in one place, if it's compute heavy, I'd lean towards putting it behind a work queue, on an independent service.

There's also the question about project complexity.. does the marketing website really need to be part of the application's project?

It's a matter of separating things out where it makes the most sense.