Fixes - Video stream URL was not working

Update peerjs server repo url

Update README.md

Changed online users title

Fixes - remove mute button status on call end

Merge branch 'audio-video-mute'

Added Audio and Video mute options

Hiding connect option

Displaying text if no one is online

Displaying online users list

Fixes - new incoming call ends the existing call

Asking confirmation before accepting call

Fixes - voice call modal is small in width

added readme file

Screenshots added