docs: function() {
  
      // set the docker env
      env.setDockerEnv();
  
      // Return whether we have the engine executable in the expected location
      var which = kbox.util.shell.which(DOCKER_EXECUTABLE);
      if (which.toUpperCase() === DOCKER_EXECUTABLE.toUpperCase()) {
        return Promise.resolve(true);
      }
  
      // We are not installed
      return Promise.resolve(false);
  
    }