Thank you for your contribution, yet it cannot be approved because it does not follow the Utopian Rules.
Portions of your description were actually taken from other sources without referencing them, this is considered plagiarism. (such as description of scalability: https://en.wikipedia.org/wiki/Scalability)
You have promised many things that were NOT delivered in the tutorial, such as mongodb and mysql tutorial.
Portions of your code were actually taken also from other sources as they are. Here is one example reference: https://modernweb.com/express-js-fundamentals/

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