docs: def generate_relay_config(self, environments: list) -> None:
          """Generate ld-relay.conf file.
  
          Given a list of environments of a project, this will generate a
          ``ld-relay.conf`` file in the current working directory. The conf file
          follows the specification that is documented in the main `ld-relay`_
          documentation.
  
          .. _ld-relay: https://github.com/launchdarkly/ld-relay#configuration-file-format
  
          :param environments: list of LaunchDarkly environments.
          """
          template = self.env.get_template('ld-relay.conf.jinja')
  
          with open('ld-relay.conf', 'w') as ld_relay_config:
              template = template.render(
                  envs=environments
              )
              ld_relay_config.write(template)