Remove explicit npm installation for deployment dockerfile too.
Remove explicit npm installation for deployment dockerfile too.

Follow-up for 8f7331bed7f378f81277f7572331a058b8470d6b

kumar303/addons-server,aviarypl/mozilla-l10n-addons-server,eviljeff/olympia,psiinon/addons-server,wagnerand/addons-server,wagnerand/olympia,wagnerand/addons-server,wagnerand/addons-server,aviarypl/mozilla-l10n-addons-server,mozilla/olympia,bqbn/addons-server,mozilla/olympia,aviarypl/mozilla-l10n-addons-server,psiinon/addons-server,bqbn/addons-server,eviljeff/olympia,kumar303/addons-server,mozilla/addons-server,kumar303/addons-server,wagnerand/olympia,kumar303/addons-server,kumar303/olympia,aviarypl/mozilla-l10n-addons-server,wagnerand/addons-server,kumar303/olympia,psiinon/addons-server,kumar303/olympia,mozilla/addons-server,mozilla/addons-server,eviljeff/olympia,mozilla/olympia,diox/olympia,diox/olympia,eviljeff/olympia,bqbn/addons-server,mozilla/olympia,wagnerand/olympia,diox/olympia,psiinon/addons-server,mozilla/addons-server,diox/olympia,kumar303/olympia,bqbn/addons-server,wagnerand/olympia