Add a GET route for $/$ that reads and returns index.html using the readFile$()$ fs function. Use an arrow function for the second parameter of readFile$().$ Use Node.js $\_\_$dirname variable to get the appropriate path for index.html$.$ Include the appropriate Content$-$Type MIME header type. If no error occurs, also include a status code of $200.$ If an error occurs, return a status code of $500.$