document proxy support
document proxy support

thoughtbot/airbrake,thoughtbot/hoptoad_notifier,square/hoptoad_notifier,benjaminoakes/airbrake,Shopify/airbrake,CarlosCD/airbrake,kakra/hoptoad_notifier,nick-desteffen/airbrake,stevecrozz/hydraulic_brake,airbrake/airbrake,airbrake/airbrake,CarlosCD/airbrake,nick-desteffen/airbrake