I have to host a subdomain of my domain to heroku app. For example abc.com points to a Hostgator account. I want to configure app.abc.com to heroku app. The domain is registered with godaddy. Can anyone please help me out.
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I'd actually point to a different part of that page:
Create a CNAME record in your DNS settings pointing
The wildcard domains section has to do with pointing any subdomain the user provides to your Heroku app; these instructions are for a single subdomain.