Include environments we use
Include environments we use

Among other things, this adds expected variables to the global
namespace, so we don't get errors about `$` not existing, etc.

annapowellsmith/openpresc,annapowellsmith/openpresc,ebmdatalab/openprescribing,ebmdatalab/openprescribing,ebmdatalab/openprescribing,annapowellsmith/openpresc,ebmdatalab/openprescribing,annapowellsmith/openpresc