updated example to use port 3000 for rails s
updated example to use port 3000 for rails s

spatten/discourse_api,oblakeerickson/discourse_api,techAPJ/discourse_api,RyzacInc/discourse_api,maclover7/discourse_api,melissawahnish/discourse_api,Odyl/discourse_api,discourse/discourse_api,jmay/discourse_api,thieunus/discourse_api