Chat with redux state manager

serg1557733 2c609fe1be fix messages styles and some bug il y a 1 an
backend e9d57662c6 fix file sending reducer il y a 1 an
frontend 2c609fe1be fix messages styles and some bug 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