yarn server - to start server

• After opening a page, user should enter his name
• After entering the name user should join new chat room
• There can be several chat rooms at the same time
• User can copy link to the room and send to another user to invite him
• User can send text messages to the chat and all users in the chat will see message
• Users should see who sent message to the chat and when
• Users should see who is in the chat room right now