notes on app per branch

gistfile1.txt

- Heroku apps aren't hosted on a ft.com domain so cookie reads fail - a pr
  request router in fastly with an canary-next.ft.com CNAME?
- Some XHR requests fail (eg, __flags.json) as the app is only serving engels
  routes.
- We shouldn't set NODE_ENV to production - adapt next-build-tools to do this.
- It takes 3 mins for the heroku box to be alive, which means it's hard to
  point sauce labs at it in the same build - Talk to Heroku ??
- Need to truncate project, branch, build, time etc. in to a 30 character
  length string.
- Destroying apps on the fly feels v. risky.
- Move the CODESHIP ENV stuff out of build tools and pass as an argument.
- Update github with a message saying 'ready' here - THINKABOUT privacy