The absolute easiest way is to use Vercel

vercel is filterd in our country and it need vpn , btw we want to put it in our web server

What are you running now for http?

Netlify

The most 2 popular next hosting is vercel or netlufy

These are the best ways

Or if netlify is restricted then you can try repl, but I don't recommend using repl

Ir see hosting with money

Like hostinger, digital Ocean etc.

If you already run apache or nginx on the server you can reverse proxy to an instance of next start

It is a little of a pain and doesnt scale quite as easily, but for a lot of applications that does not matter

It would be better to be host on a server not computer, it could slow the website

There are services for it