Dockerfile

FROM ubuntu:22.04

ENV DEBIAN_FRONTEND=noninteractive

# 1) Base setup: locales, sudo, etc.
RUN apt-get update && apt-get install -y \
    sudo wget gnupg curl ca-certificates locales \
  && locale-gen en_US.UTF-8

ENV LANG en_US.UTF-8
ENV LANGUAGE en_US:en
ENV LC_ALL en_US.UTF-8

# 2) Create default user
RUN useradd -m kasm-user \
  && echo "kasm-user:kasm" | chpasswd \
  && adduser kasm-user sudo

# 3) Create XFCE session‑cache (optional, for remembering sessions)
RUN mkdir -p /home/kasm-user/.cache/sessions \
  && chown -R kasm-user:kasm-user /home/kasm-user/.cache

# 4) Create autostart directory and add Pan autostart entry
RUN mkdir -p /home/kasm-user/.config/autostart \
  && cat > /home/kasm-user/.config/autostart/pan.desktop <<EOF
[Desktop Entry]
Type=Application
Exec=pan
Hidden=false
NoDisplay=false
X-GNOME-Autostart-enabled=true
Name=Pan Usenet Client
Comment=Start Pan at login
EOF
RUN chown -R kasm-user:kasm-user /home/kasm-user/.config

# 5) Install XFCE, VNC, Pan, and KasmVNC fork
RUN apt-get update && apt-get install -y \
    xfce4 xfce4-terminal \
    pan \
    firefox \
    x11vnc \
    websockify \
    supervisor \
    git \
  && rm -rf /var/lib/apt/lists/*

# 6) Clone and install KasmVNC (lightweight browser VNC)
RUN git clone https://github.com/kasmtech/KasmVNC.git /opt/KasmVNC \
  && cd /opt/KasmVNC \
  && ./install.sh --skip-download

# 7) Supervisor config will launch X, VNC, Websockify
COPY supervisord.conf /etc/supervisor/conf.d/supervisord.conf

USER kasm-user
WORKDIR /home/kasm-user

CMD ["/usr/bin/supervisord"]