Unable to access file on local http-server from javascript fs

Question

I'm trying to access the directory listing of files from the http-server webserver listing configured on the localhost:4040.

I have uploaded files using the http-server to mimic a file server for testing. When I use fs to access the files in the folder with the full URL (e.g. http://localhost:4040/folder1/), I get the following error:-

Error: ENOENT: no such file or directory, scandir 'http://localhost:4040/folder1/'

The directory listing is accessible if I browse the same URL through the web browser.

fs
.readdirSync(imagePath)
.forEach((filename, index) => {
   console.log(filename
   files.push({path: imagePath, fileName: filename, fullFileName: imagePath + '/' + filename})
          });