I suggest you to start with the tutorials here and to learn also what nodejs is and how to use it. Take a look also on what npm is and what is a node package before starting with typescript.
I'm creating a TS version of this SpaceInvaders to improve the project readability.
Awesome! I've hooked up a node.js backend to my react app as a test / proof of concept. It's a hassle. So anything to make that easier is fantastic.
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