Race on startup leading to spurious 404 responses

Discovered during interview and documented in the acceptance tests here:

https://gitlab.com/gitlab-org/gitlab-pages/commit/6b6eed8c9c165d7e22b07daa486a8f5496ef722b#994dde2250c69931d215373eb52f804e0b4e7f00_0_97

The pages daemon will answer requests (with a 404) before it has loaded its data for the first time. Should be pretty easy to fix.

bug

Changed title: Race on startup leading to spurious 404 errors → Race on startup leading to spurious 404 responses

Added ~1012125 label

assigned to @zj

mentioned in commit 5a346a7a

mentioned in merge request !16 (closed)

added ~1748416 label

removed assignee

added Accepting Merge Requests label

mentioned in issue #41