code: async function setEnv(service) {
    return new Promise((resolve) => {
      process.env[service.env] = `http://localhost:${service.port}`;
      resolve();
    });
  }
docs: Sets the process's environment variable given the service,
  e.g., HYDRA_SERVICE_URL="http://localhost:3010"
  @param {Service} service
  @returns {Promise}