So the current issue you are having is that you did not list vtk as a dependency of your application in the ./setup/requirements.txt file. Without VTK, your application can not run.
The next issue you will run into will be related to rendering inside docker. The default vtk library expect a GPU with X to be installed which is not true within Docker. You have 2 options. Either use the nvidia-runtime for your docker and use kitware/trame:glvnd base image with an EGL build of VTK. Or more simply use the osmesa of VTK as dependency.