Config CI using GitHub Actions

[CStewCodes]

We're going to want to implement workflows:

• [x] automatically test the code in a pull request
• [ ] Linting / Formatting using ESLint & Prettier

Consider E2E testing on the front end and unit testing on the backend (Comment from @ranegray about practicality)

[joegor85]

We got the simple test test running and passing. Just need to focus on adding new tests and getting lint and prettier functioning correctly later.

[CStewCodes]

Still working additional testing.