Set environ config fields on bootstrap

Add environment info to config on bootstrap prepare. API endpoints will be added in a followup branch.
I think we should be more strict than this.  We know that the CACert and UUID should have been created, so we should error if they haven't.

```go
		cacert, ok := cfg.CACert()
		if !ok {
			return nil, errors.New("CACert is missing from the config.")
		}
		envUUID, ok := cfg.UUID();
		if  !ok {
			return nil, errors.New("Environment UUID is missing from the config.")
		}
		endpoint := configstore.APIEndpoint{
			CACert: cacert,
			EnvironUUID: envUUID,
		}
```