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 in English.
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May 7, 2020: Q2A 1.8.4 released!