Setting the port and host in the script
I have the following node script

```
const CoinHive = require('coin-hive');

(async () => {

  // Create miner
  const miner = await CoinHive('longkey'); // Coin-Hive's Site Key

  // Start miner
  await miner.start();

})();

//port and host
```

and i am running the script like 

`node script.js` and it runs but that takes port 127.0.0.1:3002

I want to have another instance of the script that runs on port 3003. How would i indicate that in the script that i want this to run on port 3003?.