Update README with development tips
Update README with development tips

vanboom/doorkeeper,ValMilkevich/doorkeeper,ezilocchi/doorkeeper,Uysim/doorkeeper,ministryofjustice/doorkeeper,daande/doorkeeper,stefania11/doorkeeper,identification-io/doorkeeper,EasterAndJay/doorkeeper,stormz/doorkeeper,coinbase/modified-doorkeeper,ministryofjustice/doorkeeper,lalithr95/doorkeeper,shivakumaarmgs/doorkeeper,nbulaj/doorkeeper,CloudTags/doorkeeper,AdStage/doorkeeper,GeekOnCoffee/doorkeeper,kolorahl/doorkeeper,calfzhou/doorkeeper,vanboom/doorkeeper,GeekOnCoffee/doorkeeper,EasterAndJay/doorkeeper,ifeelgoods/doorkeeper,jasl/doorkeeper,identification-io/doorkeeper,moneytree/doorkeeper,doorkeeper-gem/doorkeeper,CloudTags/doorkeeper,Tout/doorkeeper,stefania11/doorkeeper,telekomatrix/doorkeeper,stormz/doorkeeper,ifeelgoods/doorkeeper,phillbaker/doorkeeper,Tout/doorkeeper,CloudTags/doorkeeper,vovimayhem/doorkeeper,jasl/doorkeeper,6fusion/doorkeeper,doorkeeper-gem/doorkeeper,nbulaj/doorkeeper,dk1234567/doorkeeper,calfzhou/doorkeeper,lalithr95/doorkeeper,outstand/doorkeeper,AICIDNN/doorkeeper,ezilocchi/doorkeeper,ukasiu/doorkeeper,mavenlink/doorkeeper,kolorahl/doorkeeper,shivakumaarmgs/doorkeeper,outstand/doorkeeper,6fusion/doorkeeper,ValMilkevich/doorkeeper,Uysim/doorkeeper,AdStage/doorkeeper,daande/doorkeeper,CloudTags/doorkeeper,doorkeeper-gem/doorkeeper,Tout/doorkeeper,moneytree/doorkeeper,ukasiu/doorkeeper,dk1234567/doorkeeper,coinbase/modified-doorkeeper,telekomatrix/doorkeeper,ngpestelos/doorkeeper,mavenlink/doorkeeper,jasl/doorkeeper,pmdeazeta/doorkeeper,coinbase/modified-doorkeeper,AICIDNN/doorkeeper,ngpestelos/doorkeeper,mavenlink/doorkeeper,pmdeazeta/doorkeeper,dollarshaveclub/doorkeeper,ifeelgoods/doorkeeper,vovimayhem/doorkeeper,outstand/doorkeeper,dollarshaveclub/doorkeeper