Create a configuration file to easy swap in of hard code values and models

An single config file maybe from which the hard coded values in the application can be centered, so that it is easier to swap values.

No files, tests, or entry points are named. Inspect the application for hard-coded values and model selections, then identify the settings that should be centralized; done means those values and models can be changed through one configuration file.

Written by the indexing model from the issue text.