— Http://expressjs.com/en/starter/hello-world.html
— Http://expressjs.com/en/starter/basic-routing.html
— Http://expressjs.com/en/guide/routing.html
— With those three you can get started easily. After that, feel free to ask any questions here
— Check out this one too, kinda helpful
— Https://nodejs.org/en/docs/guides/anatomy-of-an-http-transaction/
— Helped me understand how it works behind the scenes