Add NDS2 backend
This adds an NDS2 backend as an option for the Arrakis server. Since nds2-client is not available via PyPI, I also switched out the Dockerfile to install all the relevant packages via conda to enable this.
This adds an NDS2 backend as an option for the Arrakis server. Since nds2-client is not available via PyPI, I also switched out the Dockerfile to install all the relevant packages via conda to enable this.