Uncaught ReferenceError: RegisterSod is not defined - While accessing App Page

Hello Experts,

I am working on a basic app for SharePoint 2013. I have created a new Site Collection.

Also I have created a SharePoint Hosted App referring to following MSDN article:

msdn.microsoft.com/en-us/library/office/fp142379.aspx

After I try to deploy and access the page, App seems to be working fine. But, all the default SharePoint scripts are broken on App page. I get following error if I look at browser console (followed by tons of other broken resources):

Uncaught ReferenceError: RegisterSod is not defined

Also, by default I go to site at http://localhost:3000/SitePages/Home.aspx (works). While site page is using the domain contoso.com (gives above error).

Thanks for any hint/suggestion. Let me know if I can provide more details here.