hello world code optimization - quick $10 bucks and 5-star rating guaranteed if you can figure this out

Job ID: 35105836

Budget: $10 – $30 USD

The attached code prints "Hello World!". It uses the express web framework (npm install express).

I need this code to be optimized removing the http call while still utilizing the express framework routing capability.

This part must not be modified:

app.get('/', (req, res) => {
res.send('Hello World!')
})

This line must be removed:

app.listen(3000)

Hint:

Look into app.listen() and app.handle() in the express source code in node_modules.

Many Freelancers have spent several hours trying to figure out this challenge and failed. So please do not bid unless you already know the solution.
Related categories: Node.js Express JS