Hi. I dont' think that it is possible without big efforts. Better idea, to develop some external tool, which will help you to sync your products, quantities or anything else from your DB to nopcommerce DB
I got your goal. But You should put this script on your server. And configure your server to set correct expire headers. http://stackoverflow.com/questions/10825497/iis-7-5-how-do-you-add-a-dynamic-http-expires-header
Anyway, server should tell for client about expiration date. And you have two variants: 1) Save this JS on your side and configur your server 2) Write and ask google to configure their server for expire headers
You can't do anything with scripts hosted on third party domains. If you really want to achieve better score. You can download this script and put it inside your server and use link to ga.js form your server. You can check what Google says about that: https://support.google.com/analytics/answer/1032389?hl=en
Hi. For nopcommerce you have to use Windows hosting. Are you sure that you have right hosting on GoDaddy? You can found nopcommerce requirements here: https://www.nopcommerce.com/technologysystemrequirements.aspx
I have plugin for this purposes. I didn't expect that someone else can want that. Give me 1-2 days to clean it up a bit and i will publish it to github