Since Heroku is discontinuing its free tier November 28, 202 this article covers numerous Heroku alternatives and their pros and cons.
Not just for beginners, this article covers all the main parts of pytest, including parameterizing, fixtures, temporary files, and even monkeypatching.
A 7-part series on Django and Kubernetes.
A relatively concise guide to Dockerizing a website with Django and React.
Some performance comparisons and stats compare rendering HTML and JS rendered websites.