feat: Add API Gateway startup script with health checks and service validation

- Add start-gateway.sh script for Traefik-based API Gateway deployment
- Add JWT_SECRET environment variable validation with development fallback warning
- Create traefik/dynamic directory for dynamic configuration
- Add docker-compose orchestration with build and detached mode
- Add health check endpoints for Traefik (/ping), API Server (/api/v1/health), and Charging Engine (/v1/health)
- Add service URL documentation

scripts/start-gateway.sh

@@ -0,0 +1,72 @@
+#!/bin/bash
+
+# Telecom Platform API Gateway Startup Script
+# This script starts the platform with Traefik as the API Gateway
+
+set -e
+
+echo "Starting Telecom Platform with API Gateway..."
+
+# Check for required environment variables
+if [ -z "$JWT_SECRET" ]; then
+    echo "WARNING: JWT_SECRET not set, using default for development only"
+    export JWT_SECRET="change-me-in-production-jwt-secret-32-chars-min"
+fi
+
+# Create necessary directories
+mkdir -p traefik/dynamic
+
+# Stop any existing containers
+echo "Stopping existing containers..."
+docker-compose down
+
+# Build and start services
+echo "Building and starting services with API Gateway..."
+docker-compose up --build -d
+
+# Wait for services to be ready
+echo "Waiting for services to be ready..."
+sleep 10
+
+# Check service health
+echo "Checking service health..."
+
+# Check Traefik
+if curl -f http://localhost:8080/ping >/dev/null 2>&1; then
+    echo "Traefik: OK"
+else
+    echo "Traefik: FAILED"
+fi
+
+# Check API Server through gateway
+if curl -f http://localhost/api/v1/health >/dev/null 2>&1; then
+    echo "API Server: OK"
+else
+    echo "API Server: FAILED"
+fi
+
+# Check Charging Engine through gateway
+if curl -f http://localhost/v1/health >/dev/null 2>&1; then
+    echo "Charging Engine: OK"
+else
+    echo "Charging Engine: FAILED"
+fi
+
+echo ""
+echo "API Gateway is running!"
+echo ""
+echo "Services:"
+echo "  - Traefik Dashboard: http://localhost:8080"
+echo "  - API Server: https://api.telecom.com/api/v1"
+echo "  - Charging Engine: https://api.telecom.com/v1/credit"
+echo "  - Carrier Connector: https://api.telecom.com/v1/es2"
+echo "  - Packet Gateway: https://api.telecom.com/v1/packet"
+echo "  - Web Dashboard: http://localhost:3000"
+echo ""
+echo "To add api.telecom.com to your hosts file:"
+echo "  echo '127.0.0.1 api.telecom.com' | sudo tee -a /etc/hosts"
+echo ""
+echo "To view logs:"
+echo "  docker-compose logs -f traefik"
+echo "  docker-compose logs -f api-server"
+echo "  docker-compose logs -f charging-engine"