diff --git a/index.ts b/index.ts
index a02cf4f..15df09e 100644
--- a/index.ts
+++ b/index.ts
@@ -8,3 +8,8 @@ try {
   console.error("Failed to start server:", error);
   process.exit(1);
 }
+import { WebhookServer } from './src/server';
+
+const server = WebhookServer.start();
+
+export default server;
diff --git a/src/server.ts b/src/server.ts
index a551704..0deff6b 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -7,7 +7,13 @@ declare global {
     var Bun: typeof import('bun');
 }
 
-const PORT = 3007;
+const REQUIRED_ENV = [
+  'EVOLUTION_API_URL',
+  'EVOLUTION_API_KEY', 
+  'EVOLUTION_API_INSTANCE',
+  'WHATSAPP_COMMUNITY_ID',
+  'CHATBOT_PHONE_NUMBER'
+];
 
 type WebhookPayload = {
   event: string;
@@ -96,14 +102,16 @@ export class WebhookServer {
   static start() {
     this.validateEnv();
     
-    const PORT = process.env.PORT || 3007;
+    const PORT = process.env.PORT || '3007';
     console.log('✅ Environment variables validated');
     
     if (process.env.NODE_ENV !== 'test') {
-      return Bun.serve({
-        port: PORT,
+      const server = Bun.serve({
+        port: parseInt(PORT),
         fetch: WebhookServer.handleRequest
       });
+      console.log(`Server running on port ${PORT}`);
+      return server;
     }
   }
 }