More different base builds

alpine.Dockerfile

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+FROM alpine
+
+RUN apk update \
+    && apk add \
+# Some basic helpers \
+        bash \
+        sudo \
+        git \
+        procps \
+\
+# X11 and XFCE \
+    && apk add \
+        xvfb xauth dbus-x11 xfce4 xfce4-terminal \
+\
+# VNC \
+    && apk add \
+        python3 py3-numpy \
+        tigervnc \
+        openssl \
+\
+# NoVNC \
+    && mkdir -p /opt/noVNC \
+    && git clone --single-branch https://github.com/novnc/noVNC.git /opt/noVNC \
+    && git clone --single-branch https://github.com/novnc/websockify.git /opt/noVNC/utils/websockify \
+    && ln -s /opt/noVNC/vnc.html /opt/noVNC/index.html \
+    && openssl req -batch -new -x509 -days 365 -nodes -out self.pem -keyout /opt/noVNC/utils/websockify/self.pem \
+# Audio requirements \
+    && apk add \
+        pulseaudio \
+        pavucontrol \
+        ucspi-tcp6 \
+        gstreamer \
+        gstreamer-tools \
+        gst-plugins-good \
+        xfce4-pulseaudio-plugin
+
+COPY pulse/ /etc/pulse
+COPY novnc /opt/noVNC/
+RUN sed -i "/import RFB/a \
+        import '../webaudio.js'" \
+    /opt/noVNC/app/ui.js
+
+# Base applications
+RUN apk update \
+    && apk add \
+        firefox-esr neovim
+
+COPY entrypoint.sh /opt/noVNC/entrypoint.sh
+
+ENTRYPOINT ["/opt/noVNC/entrypoint.sh"]
+EXPOSE 8080
+
+RUN adduser --home /home/novnc --shell /bin/bash --system --disabled-password novnc \
+    && echo "novnc ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers
+
+# Add a custom version of vncserver which discards all arguments but the display
+RUN mv /usr/bin/vncserver /usr/bin/vncserver-orig \
+  && echo -e "#!/bin/bash \n \
+  /usr/bin/vncserver-orig \$1" > /usr/bin/vncserver \
+  && chmod +x /usr/bin/vncserver
+
+USER novnc
+RUN mkdir -p /home/novnc/.vnc/ \
+    && echo -e "-Securitytypes=none" > /home/novnc/.vnc/config \
+    && touch /home/novnc/.vnc/passwd && chmod 0600 /home/novnc/.vnc/passwd
+WORKDIR /home/novnc