document OS_IMAGE env variable + add other notes about running Vagrant
document OS_IMAGE env variable + add other notes about running Vagrant

x13n/contrib,thockin/contrib,piosz/contrib,spxtr/contrib,eparis/contrib,krousey/contrib,widgetpl/contrib,gmarek/contrib,x13n/contrib,k8s-packages-power/contrib,ixdy/kubernetes-contrib,jcmoraisjr/k8s-contrib,andrew-j-price/contrib,endocode/contrib,micheleorsi/contrib,jasonbrooks/contrib,foxish/contrib,kow3ns/contrib,eastbanctech/kubernetes-contrib,verb/contrib,rmmh/kubernetes-contrib,freehan/contrib,mikedanese/contrib,timstclair/kube-contrib,adamschaub/contrib,caesarxuchao/contrib,adamschaub/contrib,widgetpl/contrib,atosatto/kubernetes-contrib,widgetpl/contrib,hongchaodeng/contrib,gemini-project/contrib,chiradeep/contrib,atosatto/kubernetes-contrib,hongchaodeng/contrib,girishkalele/contrib,chiradeep/contrib,jasonbishop/contrib,vishpat/contrib,eparis/contrib,Wattpad/kubernetes-contrib,cdemers/contrib,kskalski/contrib,micheleorsi/contrib,endocode/contrib,eparis/contrib,Pensu/contrib,kow3ns/contrib,rchicoli/kubernetes-contrib,thockin/contrib,endocode/contrib,endocode/contrib,spxtr/contrib,andrew-j-price/contrib,atosatto/kubernetes-contrib,aledbf/contrib,grodrigues3/contrib,stephenrlouie/contrib,piosz/contrib,spxtr/contrib,Pensu/contrib,pwittrock/contrib,foxish/contrib,rmmh/kubernetes-contrib,jasonbishop/contrib,luxas/contrib,Wattpad/kubernetes-contrib,ixdy/contrib,lewislyou/contrib,simonswine/kubernetes-contrib,grodrigues3/contrib,timstclair/kube-contrib,rmmh/kubernetes-contrib,jcmoraisjr/k8s-contrib,chiradeep/contrib,rchicoli/kubernetes-contrib,upmc-enterprises/contrib,fcvarela/contrib,jojimt/contrib,mikedanese/contrib,piosz/contrib,eparis/contrib,devlinmr/contrib,danushkaf/contrib,pwittrock/contrib,andrew-j-price/contrib,cdemers/contrib,krousey/contrib,Pensu/contrib,pwittrock/contrib,grodrigues3/contrib,danehans/contrib,jojimt/contrib,krzyzacy/contrib,gmarek/contrib,pwittrock/contrib,kokhang/contrib,vishpat/contrib,kow3ns/contrib,olark/kubernetes-contrib,danushkaf/contrib,vishpat/contrib,foxish/contrib,vishpat/contrib,luxas/contrib,devlinmr/contrib,Q-Lee/contrib,devlinmr/contrib,aknuds1/contrib,jcmoraisjr/k8s-contrib,stephenrlouie/contrib,ixdy/contrib,vishpat/contrib,marketlogicsoftware/contrib,verb/contrib,krzyzacy/contrib,Wattpad/kubernetes-contrib,micheleorsi/contrib,grodrigues3/contrib,grodrigues3/contrib,foxish/contrib,ingvagabund/contrib,spxtr/contrib,mikedanese/contrib,chiradeep/contrib,kokhang/contrib,aledbf/contrib,moul/contrib,aledbf/contrib,ingvagabund/contrib,cdemers/contrib,krzyzacy/contrib,x13n/contrib,devlinmr/contrib,stephenrlouie/contrib,stephenrlouie/contrib,ingvagabund/contrib,danushkaf/contrib,andrew-j-price/contrib,gemini-project/contrib,caesarxuchao/contrib,ingvagabund/contrib,lavalamp/contrib,kskalski/contrib,olark/kubernetes-contrib,ixdy/kubernetes-contrib,devlinmr/contrib,aknuds1/contrib,danushkaf/contrib,jasonbrooks/contrib,chiradeep/contrib,kokhang/contrib,simonswine/kubernetes-contrib,pwittrock/contrib,Wattpad/kubernetes-contrib,jojimt/contrib,jasonbrooks/contrib,danehans/contrib,adamschaub/contrib,hongchaodeng/contrib,mikedanese/contrib,Q-Lee/contrib,kow3ns/contrib,adamschaub/contrib,piosz/contrib,k8s-packages-power/contrib,fcvarela/contrib,lavalamp/contrib,thockin/contrib,gemini-project/contrib,luxas/contrib,danehans/contrib,xialonglee/contrib,moul/contrib,spxtr/contrib,krzyzacy/contrib,lewislyou/contrib,jdavis7257/contrib,gouyang/contrib,eastbanctech/kubernetes-contrib,krousey/contrib,x13n/contrib,eparis/contrib,vishpat/contrib,lewislyou/contrib,moul/contrib,cdemers/contrib,hongchaodeng/contrib,Q-Lee/contrib,stephenrlouie/contrib,k8s-packages-power/contrib,fcvarela/contrib,cdemers/contrib,grodrigues3/contrib,verb/contrib,lewislyou/contrib,moul/contrib,gmarek/contrib,foxish/contrib,jasonbishop/contrib,xialonglee/contrib,jdavis7257/contrib,verb/contrib,marketlogicsoftware/contrib,micheleorsi/contrib,ingvagabund/contrib,caesarxuchao/contrib,jcmoraisjr/k8s-contrib,k8s-packages-power/contrib,luxas/contrib,chiradeep/contrib,atosatto/kubernetes-contrib,cdemers/contrib,freehan/contrib,upmc-enterprises/contrib,timstclair/kube-contrib,aledbf/contrib,endocode/contrib,devlinmr/contrib,jdavis7257/contrib,eastbanctech/kubernetes-contrib,upmc-enterprises/contrib,gemini-project/contrib,jdavis7257/contrib,kokhang/contrib,caesarxuchao/contrib,kokhang/contrib,girishkalele/contrib,upmc-enterprises/contrib,krousey/contrib,danushkaf/contrib,caesarxuchao/contrib,ixdy/kubernetes-contrib,jojimt/contrib,ixdy/kubernetes-contrib,foxish/contrib,krousey/contrib,jcmoraisjr/k8s-contrib,luxas/contrib,krzyzacy/contrib,lavalamp/contrib,rchicoli/kubernetes-contrib,thockin/contrib,gouyang/contrib,micheleorsi/contrib,Q-Lee/contrib,xialonglee/contrib,eastbanctech/kubernetes-contrib,Q-Lee/contrib,aledbf/contrib,adamschaub/contrib,jdavis7257/contrib,kskalski/contrib,hongchaodeng/contrib,rmmh/kubernetes-contrib,hongchaodeng/contrib,kskalski/contrib,kow3ns/contrib,danushkaf/contrib,aknuds1/contrib,fcvarela/contrib,jasonbrooks/contrib,danehans/contrib,timstclair/kube-contrib,x13n/contrib,luxas/contrib,gouyang/contrib,olark/kubernetes-contrib,girishkalele/contrib,gemini-project/contrib,rchicoli/kubernetes-contrib,marketlogicsoftware/contrib,timstclair/kube-contrib,jasonbrooks/contrib,lewislyou/contrib,chiradeep/contrib,Pensu/contrib,widgetpl/contrib,endocode/contrib,gouyang/contrib,stephenrlouie/contrib,eastbanctech/kubernetes-contrib,kow3ns/contrib,ixdy/kubernetes-contrib,eparis/contrib,jdavis7257/contrib,olark/kubernetes-contrib,freehan/contrib,k8s-packages-power/contrib,atosatto/kubernetes-contrib,verb/contrib,jcmoraisjr/k8s-contrib,mikedanese/contrib,pwittrock/contrib,simonswine/kubernetes-contrib,k8s-packages-power/contrib,upmc-enterprises/contrib,upmc-enterprises/contrib,fcvarela/contrib,rchicoli/kubernetes-contrib,gmarek/contrib,x13n/contrib,micheleorsi/contrib,marketlogicsoftware/contrib,xialonglee/contrib,freehan/contrib,lavalamp/contrib,jasonbishop/contrib,jojimt/contrib,adamschaub/contrib,eastbanctech/kubernetes-contrib,moul/contrib,gemini-project/contrib,andrew-j-price/contrib,olark/kubernetes-contrib,caesarxuchao/contrib,kskalski/contrib,Pensu/contrib,rmmh/kubernetes-contrib,kskalski/contrib,marketlogicsoftware/contrib,Pensu/contrib,Wattpad/kubernetes-contrib,simonswine/kubernetes-contrib,Q-Lee/contrib,timstclair/kube-contrib,freehan/contrib,atosatto/kubernetes-contrib,simonswine/kubernetes-contrib,lewislyou/contrib,danehans/contrib,gmarek/contrib,piosz/contrib,krzyzacy/contrib,rchicoli/kubernetes-contrib,thockin/contrib,Wattpad/kubernetes-contrib,danehans/contrib,andrew-j-price/contrib,widgetpl/contrib,aknuds1/contrib,fcvarela/contrib,gouyang/contrib,xialonglee/contrib,ixdy/kubernetes-contrib,mikedanese/contrib,ingvagabund/contrib,spxtr/contrib,aledbf/contrib,simonswine/kubernetes-contrib,verb/contrib,jojimt/contrib,thockin/contrib,jasonbishop/contrib,girishkalele/contrib,piosz/contrib,ixdy/contrib,gouyang/contrib,girishkalele/contrib,freehan/contrib,girishkalele/contrib,marketlogicsoftware/contrib,rmmh/kubernetes-contrib,xialonglee/contrib,gmarek/contrib,widgetpl/contrib,aknuds1/contrib,jasonbrooks/contrib,olark/kubernetes-contrib,lavalamp/contrib,krousey/contrib,kokhang/contrib,jasonbishop/contrib,aknuds1/contrib,lavalamp/contrib