* install redux and set authSlice
* connect navBar to the sotre
* create User type
* install react-redux-firebase
* bind to firebase
* connect App to firebase auth; display splash screen while loading auth state
* install firestore
* install firestore
* refactor tests
* edit env variables in ci
* refactor tests
* refactor tests
* edit env variables in ci
* specification test
* set public and private links sets based on authentication state
* enable frontend navigation
* set frontend link in sign in/up and landing pages
* refactor navbar tests
* style 404 page