Add Rolling logs

[DanielHabenicht]

e.g. https://github.com/serilog/serilog-sinks-file

[Trolldemorted]

This requires coordination with filebeat to ensure it does not omit files or parse files multiple times

[Savallator]

Also, i don't see the problem with the current way. We want to keep logs of the whole CTF anyways, and i don't see the gain of making such a huge change...

[DanielHabenicht]

Well see it as complementary to a possible test mode :)