Add ESLint dependencies and configuration updates

[DawidRyczko]

The pull request fixes the problem with failing test when following the steps here: https://resources.github.com/learn/pathways/automation/essentials/application-testing-with-github-actions/

We can't run the test command because missing configuration for Eslint:

There is also a problem with no-unescaped-entities and failing linter:

Not sure where I can raise the problem, but the step is also failing:
https://resources.github.com/learn/pathways/automation/essentials/automating-deploying-workflows-with-github-actions/
The instruction should be updated because the actions/upload-pages-artifact@v1 and actions/deploy-pages@v1are deprecated. The actions should be updated to actions/upload-pages-artifact@v3 and actions/deploy-pages@v4

[Arnold-P-Murphy]

I am new to this, how can I make these changes ?

[DawidRyczko]

I am new to this, how can I make these changes ?

You can use my branch or clone the main branch run npm install and run lint, and you can follow the step in the console.