It can and should be done by the military first because of less red tape involving civillian reactors. If it workd for the military it will also work for civillian operations. One just needs to modularise the reactors and their safety systems and be able to build a scalable solution with up to two dozen modules.

NuScale Power is on a similar path to deliver a working modular reactor by 2025. It uses 65x9 ft, 60 MWe modules. Not quite container sized but still transportable by bardge, train or truck.