ENV variable to VNC view only. (#1372)

Co-authored-by: Diego Molina <[email protected]>

Author: subanithak

NodeBase/start-vnc.sh

@@ -21,6 +21,11 @@ if [ "${START_XVFB}" = true ] ; then
       X11VNC_OPTS=-usepw
   fi
 
+  if [ ! -z $VNC_VIEW_ONLY ]; then
+      echo "Starting VNC server with viewonly option"
+      X11VNC_OPTS=${X11VNC_OPTS} -viewonly
+  fi
+
   for i in $(seq 1 10)
   do
     sleep 1

README.md

@@ -604,6 +604,8 @@ RUN x11vnc -storepasswd <your-password-here> /home/seluser/.vnc/passwd
 
 If you want to run VNC without password authentication you can set the environment variable `VNC_NO_PASSWORD=1`.
 
+If you want to run VNC in view-only mode you can set the environment variable `VNC_VIEW_ONLY=1`.
+
 ### Using your browser (no VNC client is needed)
 
 This project uses [noVNC](https://github.com/novnc/noVNC) to allow users inspect visually container activity with