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...");
-WebhookServer.start();
+try {
+  WebhookServer.start();
+  console.log("Server started successfully");
+} catch (error) {
+  console.error("Failed to start server:", error);
+  process.exit(1);
+}

src/server.ts

@@ -71,13 +71,13 @@ export class WebhookServer {
   }
 }
 
-static start() {
-  if (process.env.NODE_ENV !== 'test') {
-    const server = Bun.serve({
-      port: PORT,
-      fetch: WebhookServer.handleRequest,
-    });
-    console.log(`Server running on port ${PORT}`);
-    return server;
+  static start() {
+    if (process.env.NODE_ENV !== 'test') {
+      const server = Bun.serve({
+        port: PORT,
+        fetch: WebhookServer.handleRequest,
+      });
+      console.log(`Server running on port ${PORT}`);
+      return server;
+    }
   }
-}

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(() => {