This image is heavily inspired by https://registry.hub.docker.com/u/phusion/baseimage/. Please read http://phusion.github.io/baseimage-docker/ for more information.
I have the impression that the phusion baseimage is outdated; e.g. the file /etc/hosts is already writable, so there is no need for some kind of fix.
This container is not accessible via SSH, please use nsenter or docker exec.