In the docs of Laravel 5.6 its stated here that one can config his logging channels in
config/logging.php. I have updated from Larvel 5.5 to Laravel 5.6 but I could not find this config file.
Do I need to call a special artisan command for this or something like that?
This file didn’t exist in 5.5.
You can find the original one here and copy-paste it into your project.
There is a complete upgrade guide here.