Fix missing log directory on first startup.
Fix missing log directory on first startup.

This accidentally got broken when flattening the log directory structure
in 9955af00acb577777cd7bb0af644f975652bb520

NREL/api-umbrella,OdiloOrg/api-umbrella-router,OdiloOrg/api-umbrella-router,apinf/api-umbrella,apinf/api-umbrella,NREL/api-umbrella-router,NREL/api-umbrella,apinf/api-umbrella,OdiloOrg/api-umbrella-router,NREL/api-umbrella-router,NREL/api-umbrella,NREL/api-umbrella-router,apinf/api-umbrella,apinf/api-umbrella,NREL/api-umbrella