Use ESLint + Prettier to enforce coding guidelines in Node version

[boyum]

With this being an open source initiative, I miss coding guidelines. These can be set with ESLint and Prettier (one or both), and can be enforced by GH Actions.

[tplive]

My OCD approves! 😅 I suggest adding one coding_styleguide.md to each implementation, a simple list of bulletpoints with simple instructions, for instance;

• Use Prettier to format code in your IDE. The .prettierrc configuration will help you.
• Spaces, not tabs
• 4-space indents
• Start and end curly braces on own lines, not indented
• Use trailing commas
• Do not use semicolons

Please feel free to add and adjust as per your own preferences, @boyum ! :)

Also, there is Googles style guidelines for a lot of different languages

[boyum]

NO SEMICOLONS? You've seen the last collaboration.

[tplive]

That was pretty fragile... 🤣