fix #856 : Linter added for Code Cleanup

[Sweetdevil144]

Fixes #856

Linter Added to base location to detect Linting Issues.

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[aaronreed708]

I'm seeing errors like this at the top of the output that is generated by npm run lint:

/Users/aaron/git-finos/a11y-theme-builder/code/build/app.js
  0:0  error  Parsing error: ESLint was configured to run on `<tsconfigRootDir>/build/app.js` using `parserOptions.project`: <tsconfigRootDir>/tsconfig.json
However, that TSConfig does not include this file. Either:
- Change ESLint's list of included files to not include this file
- Change that TSConfig to include this file
- Create a new TSConfig that includes this file and include it in your parserOptions.project

Do you see them, too? Can they be resolved?

[Sweetdevil144]

Do you see them, too? Can they be resolved?

My bad. I forgot to add the ignorePatterns Property. This error may be fixed now. Can you verify it @aaronreed708 ?

[Sweetdevil144]

As an addition to Linting, maybe we can also ad Prettier Formatting to this PR if you agree to do so @aaronreed708

[aaronreed708]

#876 is already underway for Prettier with a PR. No reason that we can't keep them separate.

[aaronreed708]

My bad. I forgot to add the ignorePatterns Property. This error may be fixed now. Can you verify it @aaronreed708 ?

That fixed the parsing error, thank you!

[aaronreed708]

I think that this code looks just fine. I'll merge it. @Sweetdevil144 can you open an issue that can be used to create the PR to commit the updated/fixed code, please?

[Sweetdevil144]

Sure. Shiting the convo to #897