Delete Dockerfile

debian:stretch/Dockerfile

-FROM debian:stretch
-
-RUN apt-get update && apt-get -y install host telnet netcat procps net-tools iptables tcpdump && apt-get clean && rm -rf /var/cache/apt/archives /var/lib/apt/lists
-
-EXPOSE 3000 4000 5000 6000
-
-ADD netfilter_gw1.sh /netfilter.sh
-
-CMD [ "/netfilter.sh" ]