Don't run as root

Dockerfile

@@ -52,6 +52,10 @@ port=8000\n\
 #RUN sed -i -e 's/window.location.host/window.location.hostname+":8000"/' /var/www/console/htdocs/index.html && \
 #    sed -i -e 's/window.location.host/window.location.hostname+":8000"/' /var/www/console/htdocs/mech.html
 
-CMD ulimit -n 1024 && screen -d -m /root/dt_ctrl/controller/dt_ctrl /root/dt_ctrl/controller/dt_ctrl.ctrl && screen -d -m bash -c 'cd /root/dt_ctrl/console/console && ./start_console.sh' && bash
+RUN groupadd -g 80000 consoledemo && useradd -g consoledemo -M -u 80000 consoledemo
+
+USER consoledemo:consoledemo
+
+CMD ulimit -n 1024 && screen -d -m /root/dt_ctrl/controller/dt_ctrl /root/dt_ctrl/controller/dt_ctrl.ctrl && screen -d -m bash -c "cd /root/dt_ctrl/console/console && ./start_console.sh" && bash
 
 EXPOSE 8000