fix: Ensure polly's middleware goes before ember-cli's

[cibernox]

This should allow polly to work nicely with ember-cli's when the
--proxy option is passed.

[cibernox]

Closes #35

[Turbo87]

FYI this doesn't work quite as expected. The --proxy option in Ember CLI is only used for ember serve, so it does work when visiting /tests, but not when using ember test. That means that requests to a relative URL like /api/foo will not be proxied in test mode. What I did instead is this:

server.any().on('request', req => {
  if (req.url.startsWith('/api')) {
    req.url = `https://skylines.aero${req.url}`;
  }
});

This solution seems to work quite well now. I'm assuming that this is/will be a common issue for people using Polly.js, so it might make sense to add it to the documentation somewhere.

[cibernox]

Just to clarify, this dies works as intended as long as Polly recorded the events already.

[offirgolan]

@Turbo87 would specifying your proxy via testem solve this issue?

// testem.js
{
  browser_args: { /* */ },
  proxies: {
    '/api': {
      target: 'https://skylines.aero'
    }
  }
}

[Turbo87]

possibly, I wasn't aware testem could do this 🙈

[offirgolan]

😄 lemme know if it works and I'll add some documentation around it!

[Turbo87]

indeed, this seems to work very well. thanks for the idea!

[cibernox]

I've also used that config and it's great. I didn't know that trick either.