Chatterbox instance in EMS for public demo / testing

[rxl881]

Can we please set up a new instance of Chatterbox for general public testing / demo of the product.

• The instance should be on a live EMS domain, and associated with a live EMS host.
• The instance should have a simple auto-responder (similar to the staging demo instance)
• The instance should have the ability / credentials to log in as an admin to view and respond to demo interactions, if needed

Once the instance is set up it can embedded into a simple, stand-alone html page (like the one for the demo staging instance) and be publicised.

Later (as soon as possible) the instance should be embedded along-side content in the Element marketing site (Steve and marketing will need to drive this last bit, once everything else is up and running).