Salesforce B2C-Commerce-Developer

A developer wants to use an external application to manage their stores information (such as opening hours, and so on), and see their changes in their B2C Commerce Staging instance aas son as they are saved.
What is the appropriate technique the developer should perform to allow the merchant to create a new store in this scenario?

Server.get('Show', consentTracking.consent, cache.applyDefaultCache, function (req,res,next){
Var Site = require('dw/system/Syte'');
Var pageMetaHelpter = require('*/cartridge/scripts/helpers/pageMetaHelper');
pageMetaHelpter.setPageMetaTags(req.pageMetaData, Site.current);
res.render('/home/homePage');
Missing code here
}, pageMetadata.computedPageMetadata);
The controller endpoint code snippet above does not work.
Which line of code should the developer use to replace line 6 and correct the problem?

A client has two B2C Commerce sites in the same instance: one for the U.S. market, the other for the European market. They offer free gift wrapping on a selection of products. For each order, five products can be wrapped in the U.S., but only three products can be wrapped in the European region.
How should a developer allow the merchant to independently adjust this number?