Add build files with SSH client, VPN scripts, and auto-setup

Includes:
- Dockerfile extending dockurr/windows with openssh-client
- SSH key for Windows VM access
- Startup script for network setup and script deployment
- VPN automation scripts (vpn-login.js, socks5.js, vpn.bat)
- Windows setup scripts (install-nodejs.ps1, setup-autologin-sshd.ps1, setup-ssh-keys.ps1)
- Technical README

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

apps/rego-tunnel/build/rego-startup.sh

@@ -0,0 +1,66 @@
+#!/bin/bash
+# Rego-tunnel custom startup script
+# Runs when container starts
+
+set -e
+
+echo "[rego] Initializing rego-tunnel customizations..."
+
+# Copy VPN scripts to shared folder if it exists
+if [ -d "/shared" ]; then
+    echo "[rego] Copying VPN scripts to shared folder..."
+    mkdir -p /shared/vpn_scripts
+    cp -rn /opt/rego-scripts/* /shared/vpn_scripts/ 2>/dev/null || true
+    chmod -R 755 /shared/vpn_scripts/
+    echo "[rego] Scripts available at \\\\TSCLIENT\\shared\\vpn_scripts\\"
+fi
+
+# Background task: Wait for Windows and setup networking
+(
+    WINDOWS_IP=""
+    MAX_WAIT=300  # 5 minutes max wait
+
+    echo "[rego] Waiting for Windows VM to get IP..."
+
+    for i in $(seq 1 $MAX_WAIT); do
+        WINDOWS_IP=$(cat /run/shm/qemu.ip 2>/dev/null || ip neigh show dev docker 2>/dev/null | grep -oE '172\.[0-9]+\.[0-9]+\.[0-9]+' | head -1)
+        if [ -n "$WINDOWS_IP" ]; then
+            echo "[rego] Windows VM IP: $WINDOWS_IP"
+            break
+        fi
+        sleep 1
+    done
+
+    if [ -z "$WINDOWS_IP" ]; then
+        echo "[rego] Warning: Could not detect Windows IP after ${MAX_WAIT}s"
+        exit 0
+    fi
+
+    # Wait for SSH to be available
+    echo "[rego] Waiting for SSH on Windows..."
+    for i in $(seq 1 120); do
+        if nc -z "$WINDOWS_IP" 22 2>/dev/null; then
+            echo "[rego] SSH is available on Windows"
+            break
+        fi
+        sleep 2
+    done
+
+    # Setup iptables rules
+    echo "[rego] Setting up iptables rules..."
+
+    # MASQUERADE for outbound traffic
+    iptables -t nat -C POSTROUTING -o docker -j MASQUERADE 2>/dev/null || \
+    iptables -t nat -A POSTROUTING -o docker -j MASQUERADE
+
+    # Route to IBM i network via Windows VPN
+    ip route add 10.35.33.0/24 via $WINDOWS_IP dev docker 2>/dev/null || true
+
+    # Allow forwarding
+    iptables -C FORWARD -d $WINDOWS_IP -j ACCEPT 2>/dev/null || \
+    iptables -A FORWARD -d $WINDOWS_IP -j ACCEPT
+
+    echo "[rego] Network setup complete"
+) &
+
+echo "[rego] Startup script initialized"