Can't fetch local sites

[SRCthird]

I was setting up a server up/down visual and notices all of my non-public servers were erroring out. I set up this super minimal test and still am unable to connect to locally hosted sites.

// My quickly thrown together server
const http = require('http');

const server = http.createServer((req, res) => {
  res.writeHead(200, { 'Content-Type': 'application/json' });
  const array = ['apple', 'banana', 'cherry'];
  res.end(JSON.stringify(array));
});

server.listen(
  3000,
  '0.0.0.0',
  () => {
    console.log(`Server running at http://${HOST}:${PORT}/`);
  }
);

// js/GetAPI.js
class GetAPI {
  GetAPI() { }

  async getData() {
    try {
      const response = await fetch(`http:/localhost:3000`)
      return response;
    } catch (error) {
      return error.message;
    }
  }
}

<!-- Welcome.md -->
\```dataviewjs
const {GetAPI} = await cJS()
dv.list(await GetAPI.getData())
\```

This should return:

- apple
- banana
- cherry

But actually returns:

- F
- a
- i
- l
- e
- d
... to fetch

[SRCthird]

Nevermind, this was just a CORS issue :P