w3Abhishek the installation requirements assume a working hosting environment with php. Adding instructions how this php version works with your specific webserver and operating system is out of the scope of the docs.
If you have a working site on your server, perhaps you should mimic that set up and add another vhost similarly to how you've done before. It seems you have been using FPM on another website, it might be with Apache, if that's the case then you should take example of the vhost configuration from that website.
