I was using Bryntum Scheduler, but can't import it because of CORS policy. After my research, I got to know that creating a web server can solve that.
So I have learned some node.js and create a web server.
Then it's the question. I created a web server, but how can I run my page on it?
You need to serve static assets in order to serve a web page.
This is perfectly doable using pure NodeJS but if you just want to get going, take a look at the Express framework and “Express generator” that lets you scaffold a web server very quickly.
https://expressjs.com https://expressjs.com/en/starter/generator.html