"socket.io/socket.io.js" not existing

[Datarmanatar]

In the tutorials, it assumes that "socket.io.js" is created into a map named "socket.io", however, when using npm i step-04, it creates a "socket.io.js" file, but it isn't in a socket.io map. this and some other things results in that when running the tutorial (and the server points to the right map, it gets error)