- This will copy it to /target during build
- config.json will also be served from root with the dev server

- No need for this now that we're using the sdk as a package

One to produce the chatterbox app and the other to output the script and
resources needed for parent.

If we don't allow segments to nest in allowsChild, Navigation.push()
does exactly what we need.

Let the homeserver choose a username for us.
This would mean:
- our random string generator does not need to take the grammar for
  mxid into account.
- we will never have a scenario in which a username is reused by
  chance.