fix: use priceStep exists filter instead of non-existent isVerified column

src/app/app.ts

@@ -168,7 +168,7 @@ export class App implements OnInit {
     this.apigListLoading = true;
     try {
       const query: any = {
-        where: JSON.stringify({ isVerified: true }),
+        where: JSON.stringify({ priceStep: { $exists: true } }),
         keys: 'title,content,priceStep',
         order: '-updatedAt',
         limit: '20'