Add initial configuration for ESLint (fix Codacy issues)

[stweil]

Codacy uses ESLint. Tell it that certain variables like PF are defined. This avoids related issue reports about undefined variables.

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

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[stweil]

It looks like this PR has not the desired effect on Codacy. Therefore I marked it as draft now

[stweil]

Related documentation:

• https://docs.codacy.com/codacy-guardrails/codacy-guardrails-how-to-configure-rules/

[stweil]

According to the Codacy documentation, configuration files are always read from the default branch. So the change here has no effect until it was merged into the main branch. I suggest to do this, then we will see whether it works.

[henning-gerhardt]

I can not review this as

• I did not have access to nor I'm using Codacy
• I did not know how Codacy is set up for Kitodo.Production and so I don't know is this change is really working or did anything
• I'm not familiar with ESLint and did not find any documentation of all this used configuration parameters
• ESLint is using be default a different configuration file naming

[stweil]

I did not have access to nor I'm using Codacy

https://app.codacy.com/gh/kitodo/kitodo-production/issues/current does not work for you?

I did not know how Codacy is set up for Kitodo.Production

The Codacy Static Code Analysis is part of the checks which run for each pull request here.

[stweil]

ESLint is using be default a different configuration file naming

Which one? Please compare this documention.