hello-world.js

const Apify = require('apify');

Apify.main(async () => {
    // Get input of your act and print it
    const input = await Apify.getValue('INPUT');
    console.log('My input:');
    console.dir(input);

    // Save the output
    const output = {
        message: "Hello world!"
    };
    await Apify.setValue('OUTPUT', output);
});