Minor tweaks

ipnat/build/Dockerfile

@@ -8,9 +8,9 @@ RUN apt-get update --yes && \
 	apt-get upgrade --yes && \
 	apt-get install --yes --no-install-recommends \
 	bash \
-	#tini \
 	locales \
 	iptables \
+	dnsutils \
 	&& \
 	# Clean up and generate locales
 	apt-get clean && rm -rf /var/lib/apt/lists/* && \
@@ -27,7 +27,6 @@ EXPOSE 587
 COPY start.sh /start.sh
 COPY iptables.sh /iptables.sh
 
-#ENTRYPOINT ["tini", "-g", "--"]
 ENTRYPOINT ["bash"]
-CMD ["start.sh"]
+CMD ["/start.sh"]