*******USEREF()********

 USEREF() IS A REACT HOOK THAT GIVES YOU A MUTABLE OBJECT WITHOUT CAUSING A RE-RENDER WHEN THE VALUE CHANGES.

const myRef = useRef(initialValue);

myRef.current HOLDS THE ACTUAL VALUE.

IF WE USE useState()  , WHENEVER THE VALUE OF THAT VARIABLE CHANGES IT RE-RENDERS CAUSING COMPLEX PROBLEMS.

WHENEVER, RE-RENDERS EACH VARIABLE IN THE COMPONENT FUNCTION USE RESET.

HENCE,WE USE useRef()

WE DECLARE SOME OF OUR VARIABLES USING useRef().

  const socketRef = useRef();
  let socketIdRef = useRef();
  let localVideoRef = useRef();
  const videoRef = useRef([]);




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