Chat with redux state manager

serg1557733 49def55c7b add user names for messages il y a 1 an
backend ec14be119a add notifications for new incoming messages il y a 1 an
frontend 49def55c7b add user names for messages il y a 1 an
package-lock.json cca472ae25 add media query and some fix il y a 1 an
package.json cca472ae25 add media query and some fix il y a 1 an