added some docker configs

dockerfiles/build_firefox.sh

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+#!/bin/bash
+docker build -f firefox.dockerfile . -t firefox
+docker run -d --rm -p 5900:5900 --name firefox_vnc -e HOME=/ firefox x11vnc -forever -create
+sleep 5
+vncviewer localhost
+docker stop firefox_vnc
+
+

dockerfiles/build_kali.sh

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+#!/bin/bash
+docker build -f kali.dockerfile . -t kali

dockerfiles/firefox.dockerfile

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+FROM    ubuntu
+# Make sure the package repository is up to date
+#RUN     echo "deb http://archive.ubuntu.com/ubuntu precise main universe" > /etc/apt/sources.list
+RUN     apt-get update && apt-get install -y x11vnc xvfb firefox
+RUN     mkdir ~/.vnc && x11vnc -storepasswd 1234 ~/.vnc/passwd
+RUN     bash -c 'echo "firefox" >> /.bashrc'

dockerfiles/kali.dockerfile

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+FROM kalilinux/kali-linux-docker 
+RUN apt update && \
+    apt install -y nmap \
+                mc \
+                neofetch \
+    && \
+    rm -rf /var/cache/apt
+CMD /bin/bash