SuspiciousFileOperation at /admin/pyas2/privatecertificate/add/

[bee-keeper]

Hi there,

When uploading the private key I get this error.

The joined path (/pyas2/certificates/as2_private.pem) is located outside of the base path component (/media)

It seems that's due to this line below but I'm left wondering how this hasn't come up before? It feels to me like it would be better to reference the path to these keys in the settings dict rather than using upload in admin?

https://github.com/abhishek-ram/pyas2/blob/master/pyas2/models.py#L19