Create an express HTTP server in Node.js

[shash369]

You need to create an express HTTP server in Node.js which will handle the logic of a file server.

• Use built in Node.js fs module
  The expected API endpoints are defined below,

  1. GET /files - Returns a list of files present in ./files/ directory
     Response: 200 OK with an array of file names in JSON format.
     Example: GET http://localhost:3000/files
  2. GET /file/:filename - Returns content of given file by name
     Description: Use the filename from the request path parameter to read the file from ./files/ directory
     Response: 200 OK with the file content as the response body if found, or 404 Not Found if not found. Should return
     File not found as text if file is not found
     Example: GET http://localhost:3000/file/example.txt
     - For any other route not defined in the server return 404