This is a fine answer if you're responsible for a small numbers of technologies, otherwise there are far too many "top to bottom" docs to read in a lifetime, let alone the time you have to meet whatever deadline is in front of you.
Where it gets even trickier, is that these days nobody is responsible for just a small numbers of technologies.
Does your app use the internet? Read about TCP/IP and DNS and other internet technologies top to bottom.
Does your app use a database? Read the DB docs top to bottom.
How about multiple data stores?
Is you app publicly facing? Read about 100 different potential security issues top to bottom.
I could go on...
Where it gets even trickier, is that these days nobody is responsible for just a small numbers of technologies.
Does your app use the internet? Read about TCP/IP and DNS and other internet technologies top to bottom. Does your app use a database? Read the DB docs top to bottom. How about multiple data stores? Is you app publicly facing? Read about 100 different potential security issues top to bottom. I could go on...