Added error handler config to stop 500 errors when 404 encountered
Added error handler config to stop 500 errors when 404 encountered

The Server was throwing a 500 error in production when a 404 should have
been thrown. This was because the config was missing the section on what
to do for certain error situations.

Janelia-Farm-Xfam/LogoServer,Janelia-Farm-Xfam/LogoServer,ProteinsWebTeam/LogoServer,ProteinsWebTeam/LogoServer,ProteinsWebTeam/LogoServer,ProteinsWebTeam/LogoServer,Janelia-Farm-Xfam/LogoServer,ProteinsWebTeam/LogoServer,Janelia-Farm-Xfam/LogoServer,ProteinsWebTeam/LogoServer,Janelia-Farm-Xfam/LogoServer,Janelia-Farm-Xfam/LogoServer