reusable Docker file for stratcon

Simplifying this file a bit.

We will use the same file later for initiating a stratcon process, hence removing the entry point.

The way to run the noit process would be 

docker build -t noit_no_entry .
docker run --name noit_no_entry -t -i 20e137b87688 /usr/local/sbin/noitd -c noitconf/noit.conf -d

to test if noit is working check tail -f /var/log/noitd.feed/00000000 to make sure noit is listening.