How to make a server for a multiplayer game

Question

I'm writing a game and I know that multiplayer will be a great aspect of the game, but here's the problem: I have no idea how to do it. Guys, can you please tell me how to do it or send links to videos how to do it, oh and i am web developer so i use js

Answer 1

If you want to do game development the go for UNITY ENGINE

Answer 2

I said that i am web developer, i dont think unity will help me