fix: correct server class structure and improve error handling

index.ts

@@ -1,4 +1,10 @@
 import { WebhookServer } from './src/server';
 
 console.log("Starting WhatsApp Task Bot...");
+try {
   WebhookServer.start();
+  console.log("Server started successfully");
+} catch (error) {
+  console.error("Failed to start server:", error);
+  process.exit(1);
+}

tests/unit/server.test.ts

@@ -5,7 +5,11 @@ describe('WebhookServer', () => {
   const envBackup = process.env;
 
   beforeEach(() => {
-    process.env = { ...envBackup, INSTANCE_NAME: 'test-instance' };
+    process.env = { 
+      ...envBackup, 
+      INSTANCE_NAME: 'test-instance',
+      NODE_ENV: 'test'
+    };
   });
 
   afterEach(() => {