fix: Correct static method binding in webhook handler

src/server.ts

@@ -84,7 +84,7 @@ export class WebhookServer {
 					// 	groupId: payload.data?.key?.remoteJid,
 					// 	message: payload.data?.message?.conversation
 					// });
-					await this.handleMessageUpsert(payload.data);
+					await WebhookServer.handleMessageUpsert(payload.data);
 					break;
 				// Other events will be added later
 			}
@@ -222,7 +222,7 @@ export class WebhookServer {
 
 		const server = Bun.serve({
 			port: parseInt(PORT),
-			fetch: WebhookServer.handleRequest
+			fetch: (request) => WebhookServer.handleRequest(request)
 		});
 		console.log(`Server running on port ${PORT}`);
 		return server;