Thank you for your interest in Rebex Tiny Web Server.
Unfortunately, it is a simple lightweight application which was designed to show capabilities of Rebex TLS product. It is not intended to be a fully featured web server.
To keep the code simple, the Rebex Tiny Web Server provides simple GUI and we have currently no plans to add a GUI-less option which would be needed to run the application as a service. We are sorry.
However, we are going to release its source code publicly on GitHub soon which makes it possible to add any functionality for yourself. You will only need a license for Rebex TLS to run the compiled application.
Please let me know if you want to receive source code now.