Comprehensive means going from networking to configuring NGINX as a load balancer. And everything in-between. But to provide more value I chose certain languag

Comprehensive means going from networking to configuring NGINX as a load balancer. And everything in-between. But to provide more value I chose certain language runtimes and databases, because writing only in general is not as useful and tangible. What it means is that a chapter on application servers goes through some options you want to look for, and after that discusses configuration of Puma and Gunicorn as examples. So if you are running Node.js, I don't have (currently) specific configuration directives listed, but you would know what to look for. I might add more to the current list, but obviously I can never cover everything.