provide cf env variables as raven tags (#81)
provide cf env variables as raven tags (#81)

so that we have more info about the instance which raised the error
bitzesty/trade-tariff-backend,bitzesty/trade-tariff-backend,alphagov/trade-tariff-backend,alphagov/trade-tariff-backend,bitzesty/trade-tariff-backend,alphagov/trade-tariff-backend