docs(install_faq): document the Docker media type bug
docs(install_faq): document the Docker media type bug

Closes #1824

jascott1/helm,sushilkm/helm,rbwsam/helm,adamreese/helm,jascott1/helm,adamreese/deployment-manager,yan234280533/helm,yan234280533/helm,michelleN/deployment-manager,eicnix/helm,helm/helm,technosophos/deployment-manager,flynnduism/helm,SlickNik/helm,kdada/helm,fibonacci1729/helm,flynnduism/helm,appscode/helm,adamreese/helm,adamreese/deployment-manager,michelleN/deployment-manager,technosophos/deployment-manager,iamzhout/helm,helm/helm,technosophos/k8s-helm,thomastaylor312/helm,SlickNik/helm,appscode/helm,kdada/helm,FengyunPan/helm,bacongobbler/helm,sushilkm/helm,michelleN/deployment-manager,technosophos/deployment-manager,technosophos/deployment-manager,adamreese/deployment-manager,rbwsam/helm,bacongobbler/helm,FengyunPan/helm,technosophos/deployment-manager,eicnix/helm,qwangrepos/helm,michelleN/deployment-manager,iamzhout/helm,technosophos/k8s-helm,thomastaylor312/helm,adamreese/deployment-manager,qwangrepos/helm,fibonacci1729/helm,adamreese/deployment-manager