Create Dockerfile

Dockerfile

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+FROM ubuntu:22.04
+ENV DEBIAN_FRONTEND=noninteractive
+
+# 1) Install Xfce, x11vnc, Xvfb, xdotool, etc., but remove any screen lockers or power managers
+RUN apt-get update && apt-get install -y     xfce4     xfce4-goodies     x11vnc     xvfb     xdotool     imagemagick     x11-apps     sudo     software-properties-common     imagemagick  && apt-get remove -y light-locker xfce4-screensaver xfce4-power-manager || true  && apt-get clean && rm -rf /var/lib/apt/lists/*
+
+# 2) Add the mozillateam PPA and install Firefox ESR
+RUN add-apt-repository ppa:mozillateam/ppa  && apt-get update  && apt-get install -y --no-install-recommends firefox-esr  && update-alternatives --set x-www-browser /usr/bin/firefox-esr  && apt-get clean && rm -rf /var/lib/apt/lists/*
+
+# 3) Create non-root user
+RUN useradd -ms /bin/bash myuser     && echo "myuser ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers
+USER myuser
+WORKDIR /home/myuser
+
+# 4) Set x11vnc password ("secret")
+RUN x11vnc -storepasswd secret /home/myuser/.vncpass
+
+# 5) Expose port 5900 and run Xvfb, x11vnc, Xfce (no login manager)
+EXPOSE 5900
+CMD ["/bin/sh", "-c", "    Xvfb :99 -screen 0 1280x800x24 >/dev/null 2>&1 &     x11vnc -display :99 -forever -rfbauth /home/myuser/.vncpass -listen 0.0.0.0 -rfbport 5900 >/dev/null 2>&1 &     export DISPLAY=:99 &&     startxfce4 >/dev/null 2>&1 &     sleep 2 && echo 'Container running!' &&     tail -f /dev/null "]