fix: use absolute path instead of relative path

[rmehner]

We're using this addon for our ember service worker and it works quite nice so far. Thanks! :)

Little thing we noticed: If you go straight to a subroute (let's say /authenticate/123456) you'll see this in your console:

With this PR the URL is just the root URL and absolute and the service worker installs as needed. Does this make sense?

[rmehner]

Alternatively I thought about using {{rootURL}}, but that only works for Ember 2.7+ if I'm not mistaken.

[rmehner]

@jkleinsc is there anything I can do to help you with getting this merged & released? :)

[jkleinsc]

@rmehner sorry I was away. looks good to me. I'll merge it in.

[rmehner]

@jkleinsc Thanks for merging :) Is there any chance to see this in a release soon?

[jkleinsc]

@rmehner I am going to push a release today.

[jkleinsc]

@rmehner new release now available: https://www.npmjs.com/package/broccoli-serviceworker

[rmehner]

Thank you :)

[miguelcobain]

@rmehner I see the problem now. I'm using locationType: 'hash', so I don't have this kind of problem.
Yes, we should fix this using that approach, because this will break any application not located at the root.