Route correctly to draft frontends
Route correctly to draft frontends

This commit adds draft-government-frontend, draft-manuals-frontend and draft-specialist-frontend to the list of hosts to be routed by nginx.

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet