add doc about not using example envs
add doc about not using example envs

wupeiran/ursula,knandya/ursula,persistent-ursula/ursula,panxia6679/ursula,davidcusatis/ursula,pgraziano/ursula,rongzhus/ursula,nirajdp76/ursula,persistent-ursula/ursula,pgraziano/ursula,panxia6679/ursula,blueboxgroup/ursula,nirajdp76/ursula,twaldrop/ursula,greghaynes/ursula,greghaynes/ursula,msambol/ursula,lihkin213/ursula,knandya/ursula,masteinhauser/ursula,twaldrop/ursula,nirajdp76/ursula,knandya/ursula,edtubillara/ursula,twaldrop/ursula,j2sol/ursula,sivakom/ursula,fancyhe/ursula,wupeiran/ursula,lihkin213/ursula,fancyhe/ursula,fancyhe/ursula,panxia6679/ursula,edtubillara/ursula,nirajdp76/ursula,ryshah/ursula,persistent-ursula/ursula,lihkin213/ursula,zrs233/ursula,lihkin213/ursula,narengan/ursula,narengan/ursula,j2sol/ursula,sivakom/ursula,masteinhauser/ursula,j2sol/ursula,blueboxgroup/ursula,pgraziano/ursula,fancyhe/ursula,blueboxgroup/ursula,rongzhus/ursula,persistent-ursula/ursula,greghaynes/ursula,channus/ursula,wupeiran/ursula,panxia6679/ursula,zrs233/ursula,zrs233/ursula,ddaskal/ursula,ddaskal/ursula,ddaskal/ursula,zrs233/ursula,channus/ursula,channus/ursula,masteinhauser/ursula,rongzhus/ursula,narengan/ursula,edtubillara/ursula,wupeiran/ursula,twaldrop/ursula,knandya/ursula,j2sol/ursula,ddaskal/ursula,sivakom/ursula,ryshah/ursula,rongzhus/ursula,channus/ursula,msambol/ursula,ryshah/ursula,davidcusatis/ursula,edtubillara/ursula,ryshah/ursula,blueboxgroup/ursula,pgraziano/ursula,davidcusatis/ursula,narengan/ursula,masteinhauser/ursula,msambol/ursula