GET /
- loads React web app
- 'POST /api/users'
- 'PATCH /api/users'
- 'POST /api/session'
- 'DELETE /api/session'
- 'GET /api/session'
- 'GET /api/songs'
- For songs index, takes param to return n most-recent songs, includes song likes and song plays
- 'POST /api/songs'
- Creates new song and saves all song slices to the db
- 'GET /api/songs/:id/'
- Gets array of notes objects with notes and timeslices for song
- 'PATCH /api/songs/:id'
- 'DELETE /api/songs/:id'