Import the 'https' module to create an HTTPS server in Node.js.
Create options object specifying the server's key, certificate, and passphrase.
Use the 'createServer' method from the 'https' module to create the HTTPS server, passing in the options object and a callback function to handle incoming requests.
Inside the callback function, use the 'res' parameter to write a response to the client and end the response.
Call the 'listen' method on the server object, specifying the port number and an optional hostname, to start the HTTPS server and make it listen for incoming requests.