display total number of notes in header // passing state down

prevent saving an empty note (button must become disabled)

add propTypes for Header.js and Note.js components

replace the default with your github username in ./src/config/api.js

run node upload-data.js

implement "load notes from server" (will be step-by-step walk through) 😈

fetch notes in componentDidMount of App.js, transform and save notes to state

in App.js display <Spinner /> instead of <NoteList /> during server call

in App.js display 0 notes if there are no notes on server

in App.js display an errorMessage

implement

implement note deletion

add propTypes everywhere