Feat/stdin expected output from url

[gkapatia]

No description provided.

[hermanzdosilovic]

Hi @gkapatia,

Thank you for your contribution.

Unfortunately, the implementation of this feature does not satisfy the security standards that we are trying to keep in Judge0.

The biggest security problem with this implementation is that it does not limit the size of the downloaded content.

The second problem is that for an URL that returns a status code that is not 200, this code will throw an exception that is not cached anywhere.

I am sorry, but I cannot merge this until these problems are resolved.

Thank you.

Best regards,
Herman