Add some form of environment switch to enable URL swapping

Currently the service only targets `localhost:5000` when making the POST requests to sync the data back to the API, some form of switch based on an environment variable or config setting should be used which allows the app to automatically switch out the `localhost:5000` urls with `api.enderstudy.com/api/*` ones.

Not entirely sure of the best way to go about this, this service will eventually end up running on the ES server, triggered by a cron job every so often so ideally a totally hands-off set and forget type solution would be best.