return json on all server errors
return json on all server errors

naconner/lamassu-server,joshmh/lamassu-server,naconner/lamassu-server,joshmh/lamassu-server,lamassu/lamassu-server,lamassu/lamassu-server,evan82/lamassu-server,joshmh/lamassu-server,lamassu/lamassu-server,joshmh/lamassu-server,naconner/lamassu-server