nockback helper to only record remote url requests (adapted from https://github.com/Flet/tape-nock/blob/master/README.md)

nockBackHelper.js

const nock = require('nock');
const path = require('path');

nock.back.fixtures = path.resolve(`${__dirname}/fixtures/nockback/`);
nock.back.setMode('lockdown');  // change to 'record' to make new recordings

const allowLocalhost = () => { nock.enableNetConnect('127.0.0.1'); };
const filterLocalhost = (reqs) => {
  const localhost = /http:\/\/127\.0\.0\.1.*/;
  return reqs.filter(r => !localhost.test(r.scope));
};

const nockBackOptions = { after: allowLocalhost, afterRecord: filterLocalhost };
const nockBackRemotes = recordingName => nock.back(recordingName, nockBackOptions);