Spike for using boolean environment variables

[kkosiorowska]

Currently, environment variables that are of type boolean are converted to string anyway. Let's improve our work with them. Let's check if there is any possibility to use boolean types instead of checking string values. If it is difficult let's create some helper functions/variables to improve working with them.

More information here.
Originally posted by @kkosiorowska in https://github.com/thesis/acre/pull/257/files#r1502698022