Substantially borrowed from upstream ref: 13a208ee88e55 (before they
started editing generated artefacts instead of source).
Integrated, including:
- Remove previously removed features: emoji, hats, and name colors
- Compensate for lack of unified root template
- Add React build process to Dockerfile and `bootstrap/init.sh`
- Preliminary integration of chat websocket workers
For testing, modify `supervisord.conf.dev` to put chat on port 80 and
the site service on some other port. Then visit: http://localhost/chat
Still to do:
- Access control for specific small-groups (and admins probably):
Set the values somewhere (site_settings.json? Redis?) and use for
authorization in `chat_is_allowed`.
- Proxying only /chat to the websocket workers
- Chat persistance across restarts: either Redis devops or to DB
