Set up Secrets to use Environment Variables in CI Workflow

[kylermintah]

Using Environment Variables in CI Workflow

This is necessary so the CI tests can use process.env to get necessary environment variables.

• We need to define all environment variables in our env.dist as env variables in by adding an env : field inside of .github/workflows.
• API Keys we will store as secrets (probably no need to store testing port as secret... right? Let's discuss).

Steps to Completion:

1. Generate an additional Realm API key for CI testing purposes (to be stored as an encrypted GitHub secret in next step)
2. Follow these steps to add the API Key as a secure secret: Creating & Storing Encrypted Secrets
3. Review environment variable setup in .github/workflow: using environment variables