how to deployment document page

[Pompatcha]

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Deployment
I was made sure these files are placed in the root directory of your repository. These files correctly named and placed, accessible at the following URLs:

http://siam10winery.com/ for index.html
http://siam10winery.com/shoppingcart.html for shoppingcart.html

but when click add cart on index.html page, page not link with shoppingcart.html

what's happened? I want anyone share experience to solve this issue.

Thank you for your discussion in advances.