revert(cistech-tunnel): restore to working state at 5d54ed6

- Removed build/ folder
- Restored source/ folder with original Dockerfile and entrypoint.sh
- Reverted config files to original working state
- Cleaned up shared/ to only contain host routing scripts

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/cistech-tunnel/shared/xstartup

@@ -1,39 +0,0 @@
-#!/bin/bash
-# VNC xstartup - launches terminal with openconnect-vpn script
-
-unset SESSION_MANAGER
-unset DBUS_SESSION_BUS_ADDRESS
-
-# Import environment variables from container (PID 1)
-# Systemd services don't inherit Docker env vars, so we source them here
-while IFS= read -r -d '' line; do
-    export "$line"
-done < /proc/1/environ
-
-export XDG_RUNTIME_DIR=/tmp/runtime-root
-mkdir -p $XDG_RUNTIME_DIR
-chmod 700 $XDG_RUNTIME_DIR
-
-# GPU/WebKit workarounds for browser
-export GDK_BACKEND=x11
-export WEBKIT_DISABLE_DMABUF_RENDERER=1
-
-# Start dbus session
-[ -x /usr/bin/dbus-launch ] && eval $(dbus-launch --sh-syntax --exit-with-session)
-
-# Start window manager
-openbox &
-sleep 2
-
-# Disable screen blanking and power saving
-xset s off 2>/dev/null || true
-xset -dpms 2>/dev/null || true
-xset s noblank 2>/dev/null || true
-
-# Make script executable and launch in terminal
-chmod +x /shared/openconnect-vpn 2>/dev/null || true
-xterm -fa 'Monospace' -fs 11 -bg black -fg white -geometry 130x45+10+10 \
-    -title "Cistech VPN Terminal" \
-    -e "bash -c '/shared/openconnect-vpn; exec bash'" &
-
-wait