Add git hooks for enforcing specific styles

[visualcookie]

Idea

Before submitting code changes, we need to identify simple issues, to enforce a certain code structure and check for any issues, that could break the application when pushing it. If anything fails, the code changes won't be submitted to the repository until it gets fixed.

Open questions

• What things should be checked using the pre-commit hook?
• What tools are available for a pre-commit hook check?

[iduuck]

What tools are available for a pre-commit hook check?

I would suggest husky since it has 3,275,175 weekly downloads, it should be fairly the standard in the npm ecosystem.

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What things should be checked using the pre-commit hook?

I wouldn't focus on just the pre-commit hook, but also the pre-push, so we can also implement some more heavy operations such as testing the code. Because we are commiting more often, we don't want to run the whole test suite against each commit, but rather against each push. This makes much more sense in my eyes.

I would suggest the following hooks:

Hook Name	Tool(s)	What to check?
pre-commit	eslint, tsc	Linting the code, perhaps typechecking for typescript issues
commit-msg	commitlint	Linting the commit message, so we also have a unified commit message layout
pre-push	Any test framework	Testing (+ complex operations, that shouldn't run on each commit)

[iduuck]

Already in the documentation, so I think this should be fine by the release of the documentation.