You do not need to do any folder modification, just create a subdomain. Usually you can easily do it through the hosting administration panel, consult your provider.
(hostgator is called cpanel. www.yoursite.com/cpanel)
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask here, in English.
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April 20, 2021: Q2A 1.8.6 released!