Ensure users know when they are on the demo site (#354)
Ensure users know when they are on the demo site (#354)

And ensure that supporting heroku apps are pre-warmed when starting a
submission.
ministryofjustice/tax-tribunals-datacapture,ministryofjustice/tax-tribunals-datacapture,ministryofjustice/tax-tribunals-datacapture,ministryofjustice/tax-tribunals-datacapture