COOPR 542: Add ability to configure UI to use TLS

SSL/TLS implemented for coopr-ui.
```
COOPR_EFFECTIVE_PORT=COOPR_UI_SSL_PORT
if(!COOPR_SSL) {
  COOPR_EFFECTIVE_PORT = COOPR_UI_PORT
}

httpServer.listen(COOPR_EFFECTIVE_PORT, null, null, function() {
   console.info(httpLabel + ' listening on port %s', COOPR_EFFECTIVE_PORT);
});

```