What do you need to understand when writing a client-server application with a database?

Question

Java

I bought VDS, wrote a simple socket server and client in Java.
Everything works, but I'm afraid that I'm missing something, because there are some other servlets, REST API, and other magic.
Should I get into this when all I need is a database and business logic? Maybe I will scale up.

PS Sorry for the tags, but what else to put here...

Answer 1

You can do whatever you want for yourself. It is necessary to do for others in such a way that it can be supported by other developers with minimal effort and a million other criteria