Remove light-locker to disable screen lock

Closes https://github.com/yuvipanda/jupyter-desktop-server/issues/25

Dockerfile

@@ -13,8 +13,10 @@ RUN apt-get -y update \
    xorg \
    xubuntu-icon-theme
 
+# Remove light-locker to prevent screen lock
 RUN wget 'https://sourceforge.net/projects/turbovnc/files/2.2.5/turbovnc_2.2.5_amd64.deb/download' -O turbovnc_2.2.5_amd64.deb && \
-   apt-get install ./turbovnc_2.2.5_amd64.deb && \
+   apt-get install -y -q ./turbovnc_2.2.5_amd64.deb && \
+   apt-get remove -y -q light-locker && \
    rm ./turbovnc_2.2.5_amd64.deb && \
    ln -s /opt/TurboVNC/bin/* /usr/local/bin/