How to pass requests from a Plesk hosted domain to the application listening on a local port?

Question

How to forward requests from the domain to an specific application running locally on a given port?
How to make the application content available by browsing the domain?

Answer

1. Log into Plesk

2. Go to Domains > example.com > Dashboard > PHP
3. Uncheck the PHP Support option
4. Press OK

5. Go to Domains > example.com > Hosting & DNS > Apache & nginx Settings.

6. Uncheck the Proxy mode option.

7. Add the following lines into Additional nginx directives:

   location / {
   proxy_set_header X-Forwarded-For $remote_addr;
   proxy_set_header Host $http_host;
   proxy_pass http://127.0.0.1:3000;
   }

   Note: Replace 3000 with the corresponding port number where the application listen.

8. Press OK button to apply the changes.