Chat with redux state manager

serg1557733 711a0f6511 fix some bugs v1 il y a 1 an
backend 711a0f6511 fix some bugs v1 il y a 1 an
frontend 711a0f6511 fix some bugs v1 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