reogranized app and added more headers

src/middleware.ts

@@ -0,0 +1,35 @@
+/**
+ * Middleware functions for the proxy detection API
+ */
+
+import { FastifyRequest, FastifyReply } from 'fastify';
+import { config } from './config';
+
+/**
+ * API Key authentication middleware
+ * Skips authentication for health check and debug endpoints
+ */
+export async function authMiddleware(request: FastifyRequest, reply: FastifyReply) {
+  // Skip auth for health check and debug endpoints
+  if (request.url === '/health' || request.url === '/ip-debug') {
+    return;
+  }
+
+  const apiKey = request.headers['x-api-key'] || (request.query as Record<string, any>)?.api_key;
+  
+  if (!apiKey) {
+    reply.code(401).send({ 
+      error: 'API key required', 
+      message: 'Please provide API key in X-API-Key header or api_key query parameter' 
+    });
+    return;
+  }
+  
+  if (apiKey !== config.api.key) {
+    reply.code(403).send({ 
+      error: 'Invalid API key', 
+      message: 'The provided API key is not valid' 
+    });
+    return;
+  }
+}