0.6_ New note.txt

title 0.6: New note

note left of browser: 
user makes new note 
and click save button
end note

note over browser: 
update DOM with new note
end note

note over browser: 
convert new note to JSON
end note

browser->server: HTTP POST https://studies.cs.helsinki.fi/exampleapp/new_note_spa

note over server: 
server add new note 
to the notes page
end note

server-->browser: HTML status code 201 (Created) & JSON content [{content: "cryofrain",date: "2021-06-01T21:12:02.363Z"}, ...]