Create Dockerfile for Kronos

Docker has 3 kronos services, one for all, one for readonly, one for collector. When docker is run, all three are started. Three ports are mapped. The log directory is mapped to `/var/log/kronos`. Settings file at `/etc/kronos/settings.py` is mapped into the docker.
randomly picked 8550 on my computer because 8150 was already taken. i don't think it really matters because the user will just change the makefile to the port they want. Same for the /etc/kronos mapping