Improve test suite

[fishmonger45]

Description

• Begin working through the tests. Still a bunch of tests to work through and make. Pull atm just includes a draft of auth tests. Still need to reduce duplication of describe blocks and use before/after hooks to reduce code duplication
• Also adds npm run coverage for a local coverage report. I don't feel the need to put this in CI/CD because I'm probably the only one who's going to be using it.
• validate.test.ts should be removed when we have proper types in backend

Fixes/resolves #97

Type of change

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• [x] Improvement (non-breaking change which improves existing functionality)

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[fishmonger45]

deploy action has been split to a separate file; no idea if it works or not :cowboy_hat_face:

[fishmonger45]

Please review. I am aware that there are some extensions that are required to be made to the test suite due to new endpoints being introduced. These will be done in a separate PR because we really need some base level tests in the project.

[fishmonger45]

repinging jchad because i suspect it didn't work out of the box because you are on windows? mb. have added crossenv now.

[j-chad]

Yeah I am currently on windows 😢. It works well with cross-env, I'm just investigating the issues with the tests that are being skipped