Adds jest unit tests

[cesaragv]

This PR sets up and adds the initial unit tests for the front-end.
As more files are touched during the run npm test, code coverage decreases

[reddigari]

Looks great! I've never used snapshots to test against...how likely is it that they will need to be changed as we keep developing? I have a feeling they will be very useful vs manually writing assertions since we're strapped for time.

[cesaragv]

Looks great! I've never used snapshots to test against...how likely is it that they will need to be changed as we keep developing? I have a feeling they will be very useful vs manually writing assertions since we're strapped for time.

@reddigari I used them before, and once the project is stable, they don't really need to change much.

[reddigari]

Reminder to add the execution of these tests to the Github Actions config once #75 is merged.

[reelmatt]

If we're removing the package-lock.json file do we also want to include that in .gitignore so we don't recommit it going forward? I think its good practice to include the -lock files in the repo, but I'm not entirely sure.

[reddigari]

Oh I didn't catch that --- yeah it's good practice to leave them in because it ensures everyone's using the same versions and prevents dependency hell when people clone and install. @cesaragv could we put it back and see if we have the version issues you mentioned?

[cesaragv]

Oh I didn't catch that --- yeah it's good practice to leave them in because it ensures everyone's using the same versions and prevents dependency hell when people clone and install. @cesaragv could we put it back and see if we have the version issues you mentioned?

@reddigari yes, I just did