Client-side implementation

Now that the server side is completed, the client-side script needs to be modified to accommodate the new functionality that has been added:

    /**
     * First, define a function that will initialize the 
    socket connection and add listeners
     * to the required events
     */
    const addSocketListeners = () => {
      /**
       * The "io" constructor is available to us after 
    including the socket.io library script in the     "index.html" file
       * Initializing the socket connection is as easy as the 
    statement below
       */
      const socket = io()

      /**
       * An event listener is attached to the "new-
    temperature" event
    * The handler is similar to the handler that was attached 
     to the GET /temperature API, so in essence, we are 
    replacing the API call with the socket event...