Chat with redux state manager

serg1557733 49def55c7b add user names for messages 2 vuotta sitten
backend ec14be119a add notifications for new incoming messages 2 vuotta sitten
frontend 49def55c7b add user names for messages 2 vuotta sitten
package-lock.json cca472ae25 add media query and some fix 2 vuotta sitten
package.json cca472ae25 add media query and some fix 2 vuotta sitten