My preferred approach is to hand-code this ZLayer solution. Maybe that's because I know how to work with a Java Properties file, i.e., how to read and load it, so I like to see those details.
The following ZIO 2 and Scala 3 code shows how to read that properties file when it's located in the same directory in which you start this application. I have added a lot of comments to the code, so please see the comments and Scala code for more information.
Here I create a ZLayer named `live` by actually doing the work of reading the properties file, populating an AppConfig instance, and then returning that instance.
This is the "main" ZIO 2 application, including an `app` value and the required `run` value. The `run` value provides the configuration information to the `app`.
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