Fixed problems so website can be deployed, added functionality to close button for entries

For background, I started this project the month before June. It was very basic though, I didn’t get too much done…
because most of the time spent was battling the error of the blank screen of death!
It had something to do with dependencies not being installed and NavLink (which I was using to have different pages for the main page, diary, and to-do list) acting up. But I figured it out eventually!