Sure! You should follow the tutorial from the beginning and deploy your own app on your own AWS cloud. After doing this, you will get your own API link and you will be able to call it.
The example I shared is just an example, it works for me but you should change everything by your own values.
No, but in case you would like to add your serverless.yml file in your versionned files, you can use this method. However, there is a better solution here: https://forum.serverless.com/t/how-to-deal-with-environment-variables-source-control-serverless-yml/2248/2
Thank you Kenny Patierno ! Please add your suggestions as a PR in https://github.com/eon01/DockerCheatSheet and I’ll be happy to add them and update this article.