Chat with redux state manager

serg1557733 52f374141a add normal time format with relative date js vor 1 Jahr
backend 711a0f6511 fix some bugs v1 vor 1 Jahr
frontend 52f374141a add normal time format with relative date js vor 1 Jahr
package-lock.json cca472ae25 add media query and some fix vor 1 Jahr
package.json cca472ae25 add media query and some fix vor 1 Jahr