A simple example demonstrating how to use post-deploy hooks:

1. run npm install to grab the dependencies
2. run npm start to set up the lambda project under the default name on AWS
3. load the URL that the create command prints out -- you should see from-create
4. run npm run deploy to update the lambda with a different configuration in a post-deploy step
5. load the URL again, you should see from-update

Check out package.json to see how the configuration parameter custom-message is passed to these steps, and check out web.js, especially the like starting with api.addPostDeployStep to see how the argument gets used to initialise stage variables.