Dockerfile

# Use the official Ubuntu 20.04 image as the base
FROM ubuntu:20.04

# Prevent interactive prompts during package installation
ENV DEBIAN_FRONTEND=noninteractive

# Update and upgrade the system packages
RUN apt update && \
    apt upgrade -y

# Install XFCE desktop environment and essential packages
RUN apt install -y \
    xfce4 \
    xfce4-goodies \
    tightvncserver \
    novnc \
    net-tools \
    nano \
    vim \
    neovim \
    curl \
    wget \
    firefox \
    git \
    python3 \
    python3-pip

# Set XFCE terminal as the default terminal emulator
RUN update-alternatives --set x-terminal-emulator /usr/bin/xfce4-terminal.wrapper

# Setup Chromium browser
RUN git clone /~https://github.com/scheib/chromium-latest-linux.git /chromium && \
    /chromium/update.sh

# Define environment variables for VNC and noVNC configuration
ARG USER=root
ENV USER=${USER}

ARG VNCPORT=5900
ENV VNCPORT=${VNCPORT}
EXPOSE ${VNCPORT}

ARG NOVNCPORT=9090
ENV NOVNCPORT=${NOVNCPORT}
EXPOSE ${NOVNCPORT}

ARG VNCPWD=changeme
ENV VNCPWD=${VNCPWD}

ARG VNCDISPLAY=1920x1080
ENV VNCDISPLAY=${VNCDISPLAY}

ARG VNCDEPTH=16
ENV VNCDEPTH=${VNCDEPTH}

# Setup VNC server configuration
RUN mkdir -p /root/.vnc/ && \
    echo ${VNCPWD} | vncpasswd -f > /root/.vnc/passwd && \
    chmod 600 /root/.vnc/passwd && \
    echo "#!/bin/sh \n\
xrdb $HOME/.Xresources \n\
xsetroot -solid grey \n\
export XKL_XMODMAP_DISABLE=1 \n\
/etc/X11/Xsession \n\
startxfce4 & \n" > /root/.vnc/xstartup && \
    chmod +x /root/.vnc/xstartup

# Setup noVNC with SSL certificates
RUN openssl req -new -x509 -days 365 -nodes \
      -subj "/C=US/ST=IL/L=Springfield/O=OpenSource/CN=localhost" \
      -out /etc/ssl/certs/novnc_cert.pem -keyout /etc/ssl/private/novnc_key.pem && \
      cat /etc/ssl/certs/novnc_cert.pem /etc/ssl/private/novnc_key.pem > /etc/ssl/private/novnc_combined.pem && \
      chmod 600 /etc/ssl/private/novnc_combined.pem

# Define the entry point for the container
ENTRYPOINT ["/bin/bash", "-c", "\
  echo 'NoVNC Certificate Fingerprint:'; \
  openssl x509 -in /etc/ssl/certs/novnc_cert.pem -noout -fingerprint -sha256; \
  vncserver :0 -rfbport ${VNCPORT} -geometry $VNCDISPLAY -depth $VNCDEPTH -localhost; \
  /usr/share/novnc/utils/launch.sh --listen $NOVNCPORT --vnc localhost:$VNCPORT --cert /etc/ssl/private/novnc_combined.pem"]