Example of http/2 landed in Node.js 9 without --expose-http2 flag

http2-example.js

const http2 = require('http2');
const fs = require('fs');

const server = http2.createSecureServer({
    key: fs.readFileSync('key.pem'),
    cert: fs.readFileSync('cert.pem')
});

server.on('error', (err) => console.error(err));
server.on('socketError', (err) => console.error(err));
server.on('stream', (stream, headers) => {
    // stream is a Duplex
    stream.respond({
        'content-type': 'text/html',
        ':status': 200
    });
    stream.end('<h1>Hello World</h1>');
});

server.listen(8443);