Fix getting started example, missing env
Fix getting started example, missing env

LineMetrics/cowboy,rabbitmq/cowboy,heroku/cowboy,rbalint/pkg-erlang-cowboy,ferd/cowboyku,pap/cowboy,MSch/cowboy,unisontech/cowboy,cad627/cowboy,binarin/cowboy,ninenines/cowboy,callsign-core/cowboy_hybi00,heroku/cowboy,hairyhum/cowboy,layerhq/cowboy,omusico/cowboy,bobos/ecweb,kivra/cowboy,piboye/cowboy,binarin/cowboy,acrispin/cowboy,Reimerei/cowboy,noname007/cowboy,sile/cowboy,dangjun625/cowboy,piboye/cowboy,yangchengjian/cowboy,venkateshreddy/cowboy,276361270/cowboy,unisontech/cowboy,paulperegud/cowboy,CrankWheel/cowboy,essen/cowboy,layerhq/cowboy,K2InformaticsGmbH/cowboy,callsign-core/cowboy_hybi00,nviennot/cowboy,bsmr-erlang/cowboy,LineMetrics/cowboy,manastech/cowboy,yangchengjian/cowboy,heroku/cowboyku,cad627/cowboy,lpgauth/cowboy,turtleDeng/cowboy,essen/cowboy,imdeps/cowboy,odo/cowboy,manastech/cowboy,grahamrhay/cowboy,lpgauth/cowboy,linearregression/cowboyku,LineMetrics/cowboy