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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 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)