Set lively hostname and port in config to allow for HTTP proxying

## Set lively hostname and port in config to allow for HTTP proxying

### Acceptance Criteria
1. Hostname and port for lively server in config.js.
1. Oauth2 Proxy uses hostname and port from config. 

### Tasks
- Add items to `config.dist.js`
- Edit Oauth2 Proxy to use items from config.
- Add flood protection to Oauth2 Proxy.

### Additional Notes
- None
Isn't this already available via `this.props.config.lively` ?