Is it possible to implement TorrServer in the DietPi or at least to get an advice how to handle installation in the correct way separately for noobs like me. 
Link to repo:
a how-to install is described on the GitHub link you shared https://github.com/YouROK/TorrServer#installation
They offer pre-compiled binary, that you be download simply https://github.com/YouROK/TorrServer/releases