chore: setup global root .env and auto-start script

start.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+set -e
+
+echo "======================================"
+echo " Starting NexusGuard SD-WAN Suite...  "
+echo "======================================"
+
+# Auto-create .env if it doesn't exist
+if [ ! -f .env ]; then
+    echo "[!] .env file not found."
+    if [ -f .env.example ]; then
+        echo "[+] Auto-generating .env from .env.example..."
+        cp .env.example .env
+        echo "[!] IMPORTANT: Please review the .env file and change the default passwords!"
+    else
+        echo "[-] ERROR: .env.example is missing. Cannot generate .env."
+        exit 1
+    fi
+else
+    echo "[+] .env file detected."
+fi
+
+# Make sure Docker is available
+if ! command -v docker-compose &> /dev/null; then
+    echo "[-] ERROR: docker-compose is not installed. Please install Docker first."
+    exit 1
+fi
+
+echo "[+] Bringing up Docker containers..."
+docker-compose up -d
+
+echo "======================================"
+echo " NexusGuard is successfully running!  "
+echo " API Port : 8080"
+echo "======================================"