feat: refactor and allow running in background

start.sh

@@ -1,5 +1,7 @@
 #!/bin/bash
-# export FORCE_REINSTALL_TURBOVNC=1 to reinstall turbovnc to the latest version
+# Sample usage: RUN_IN_BACKGROUND=1 ./start.sh
+# set FORCE_REINSTALL_TURBOVNC=1 to reinstall turbovnc to the latest version
+# set RUN_IN_BACKGROUND=1 to start proxy and vnc client in background
 
 set -e
 
@@ -9,6 +11,7 @@ cd "$SCRIPT_DIR"
 . ./utils/shell-logger
 
 hasUpdated=0
+NOVNC_PORT=6080
 
 # desktop environment installation
 if ! dpkg-query -W -f='${Status}' xfce4 2>/dev/null | grep -q "install ok installed"; then
@@ -44,21 +47,35 @@ startxfce4 &
 EOF
 
 display=$(/opt/TurboVNC/bin/vncserver -list | grep -E "^:" | awk '{print $1}')
+displayNumber=${display/:}
+info "previous display number $displayNumber"
 
 if [ ! -z $display ]; then
     info "restarting vnc server on display $display"
     /opt/TurboVNC/bin/vncserver -kill $display
+else
+    info "no display found"
 fi
 /opt/TurboVNC/bin/vncserver -localhost -depth 24 -geometry 3440x1440
+display=$(/opt/TurboVNC/bin/vncserver -list | grep -E "^:" | awk '{print $1}')
+displayNumber=${display/:}
+displayPort=$((5900+$displayNumber))
+info "display number $displayNumber, display port $displayPort"
 
 cd utils
 
 # Start noVNC
 info "starting vnc client and forwarder"
-if lsof -t -i:6080; then
-    kill -9 $(lsof -t -i:6080)
+if lsof -t -i:$NOVNC_PORT>/dev/null; then
+    info "previous novnc client detected, killing process now"
+    kill -9 $(lsof -t -i:$NOVNC_PORT)
 fi
 
-echo "6080-$WEB_HOST:80"
-
-./novnc_proxy --vnc localhost:5901 
+if [ ! -z $RUN_IN_BACKGROUND ]; then
+    info "running novnc proxy in background"
+    mkdir -p ~/logs
+    ./novnc_proxy --vnc localhost:$displayPort &> ~/logs/novnc.log &
+    printf "\nNavigate to this URL:\n\n$NOVNC_PORT-$WEB_HOST/vnc.html\n"
+else
+    ./novnc_proxy --vnc localhost:$displayPort 
+fi