only try ns-upload if NIGHTSCOUT_HOST exists
only try ns-upload if NIGHTSCOUT_HOST exists

openaps/oref0,PieterGit/oref0,PieterGit/oref0,openaps/oref0,scottleibrand/openaps-sh,PieterGit/oref0,openaps/oref0,PieterGit/oref0,openaps/oref0