Tests are not running when npm run <testname> is put

[Sam-Nadar]

I have a solution for this and will be making a pull request to solve. Hey @hkirat if you find this issue please
kindly check and merge the pull request or make the changes yourself.

[164adityakumar]

correct the package.json file and replace the test-fileServer with this :
"test-fileServer": "npx jest ./tests/fileServer.test.js",