initial linting and testing set up

[jennymar]

Info

Closes #2

Description

What changes did you make? List all distinct problems that this PR addresses. Explain any relevant
motivation or context.

This PR adds basic linting and testing as well as has them run on creation of PR against the main branch.

Changes

Linting:

• added linting scripts
  Testing:
• set up Jest (added it as a dependency, added jest.config.json, added script)
• created a few dummy tests in sample.test.ts

Type of Change

• Patch (non-breaking change/bugfix)
• Minor (non-breaking change which adds functionality)
• Major (fix or feature that would cause existing functionality to not work as
  expected)
• Documentation (A change to a README/description)
• Continuous Integration/DevOps Change (Related to deployment steps, continuous integration
  workflows, linting, etc.)
• Other: (Fill In)

If you've selected Patch, Minor, or Major as your change type, make sure to bump the version before merging in package.json!

Testing

I have tested that my changes fully resolve the linked issue ...

• locally.
• on the testing API/testing database.
• with appropriate Postman routes. Screenshots are included below.

Checklist

• I have performed a self-review of my own code.
• I have followed the style guidelines of this project.
• I have appropriately edited the API version in the package.json file.
• My changes produce no new warnings.

Screenshots

Please include a screenshot of your Postman testing passing successfully.

[github-actions]

Thanks for contributing!
If you've made changes to the API's functionality, please make sure to bump the package
version—see this guide to semantic versioning for details—and
document those changes as appropriate.

[echang594]

Just small nitpicks, looks good otherwise. We can add the docker stuff in a new PR.

[echang594]

Don't think this will cause any issues but we are using node version lts/iron (currently 20.18.0).

[echang594]

Same as above

[echang594]

Looks good to me 👍