Feature/connect journal backend

[Oliversw]

Backend route and database query for all goals from the logged in user. Saves in context and populates the journal page with the returned goals. This means that @SalwaMugh, you should be able to populate the dashboard goals with items from context.state.goalData 🙂

Also uses the same route inside the function to add goals, so that whenever we add a new one, an updated list of goals is returned and rendered on the page

Bugs/todo later:

• still currently depends on a hard coded user id, stored in the context
• eventually we can also separate the api call into a separate file that can be called on both the journal page and the dashboard page
• goals currently display with the oldest first, but it would be nice to do the opposite. #119

[Oliversw]

closing because I added to new PR