Fix API URL handling for Docker deployment

- Replace hardcoded localhost URLs with dynamic host detection from request headers
- Supports both development (localhost:3001) and Docker (localhost:9000 -> 3000) environments
- Uses host header to determine correct protocol and port for internal API calls
- Updated execute-dex, validate, and orders APIs to use dynamic baseUrl
- Ensures proper API communication in containerized environments

app/api/trading/orders/route.js

@@ -106,6 +106,11 @@ export async function POST(request) {
     const body = await request.json()
     const { action, orderId, ...orderData } = body
 
+    // Get the base URL from the request
+    const host = request.headers.get('host') || 'localhost:3000'
+    const protocol = host.includes('localhost') ? 'http' : 'https'
+    const baseUrl = `${protocol}://${host}`
+
     if (action === 'add') {
       // Load existing orders
       const pendingOrders = loadPendingOrders()
@@ -187,7 +192,7 @@ export async function POST(request) {
 
       try {
         // Execute the trade by calling the trading API
-        const tradeResponse = await fetch('http://localhost:3000/api/trading', {
+        const tradeResponse = await fetch(`${baseUrl}/api/trading`, {
           method: 'POST',
           headers: { 'Content-Type': 'application/json' },
           body: JSON.stringify({