How to Deal with 'nginx.conf' file

Hello Hestia Team and Other Hestians.

Actually, I know this is not good to ask for help here regarding anything else except HestiaCP.
But I tried almost all possible ways and not able to solve the issue.
What I have to do is…

I have a ‘nginx.conf’ file in /home/{user}/web/{web}/public_html/.nginx.conf. I have to include this with nginx.conf for the same user and website.

I tried to add it as “include /home/{user}/web/{web_address}/public_html/.nginx.conf”

But When I restart Nginx with the new Configuration, it give error and cannot be started…

The Software I am talking about is Flarum Forum Software…
Guide I’m following : https://docs.flarum.org/install.html#url-rewriting

Am I not following steps correctly or there is other way to do so.

Thanks in Advance.