Take static file in self hosted Web API

Question

I like to get static file from the project to browser like https://localhost:3440/myFile.txt.

I placed the "myFile.txt" in the root directory near App.config file. But due to some reason I got only 404. Any idea?

About Application

1. WebAPI project, self hosted with Owin

2. No IIS, run with console.

Tried:

https://www.codeproject.com/Tips/1081630/How-to-Access-Static-Content-Files-in-MVC-Applicat