| 123456789101112131415161718192021222324252627282930 | FROM debian:buster# Install git, supervisor, VNC, & X11 packagesRUN set -ex; \    apt-get update; \    apt-get install -y \      bash \      fluxbox \      git \      net-tools \      novnc \      supervisor \      x11vnc \      xterm \      xvfb# Setup demo environment variablesENV HOME=/root \    DEBIAN_FRONTEND=noninteractive \    LANG=en_US.UTF-8 \    LANGUAGE=en_US.UTF-8 \    LC_ALL=C.UTF-8 \    DISPLAY=:0.0 \    DISPLAY_WIDTH=1024 \    DISPLAY_HEIGHT=768 \    RUN_XTERM=yes \    RUN_FLUXBOX=yesCOPY . /appCMD ["/app/entrypoint.sh"]EXPOSE 8080
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