Update the description for dockerfile argument to indicate that the value should be path to the folder containing Dockerfile.
Update the description for dockerfile argument to indicate that the value should be path to the folder containing Dockerfile.

zamont/core-setup,steveharter/core-setup,weshaggard/core-setup,joperezr/core-setup,crummel/dotnet_core-setup,weshaggard/core-setup,weshaggard/core-setup,wtgodbe/core-setup,MichaelSimons/core-setup,crummel/dotnet_core-setup,ericstj/core-setup,vivmishra/core-setup,MichaelSimons/core-setup,zamont/core-setup,weshaggard/core-setup,vivmishra/core-setup,ravimeda/core-setup,janvorli/core-setup,wtgodbe/core-setup,ericstj/core-setup,ramarag/core-setup,wtgodbe/core-setup,zamont/core-setup,wtgodbe/core-setup,ravimeda/core-setup,ramarag/core-setup,chcosta/core-setup,ericstj/core-setup,MichaelSimons/core-setup,janvorli/core-setup,crummel/dotnet_core-setup,ramarag/core-setup,vivmishra/core-setup,gkhanna79/core-setup,janvorli/core-setup,janvorli/core-setup,weshaggard/core-setup,chcosta/core-setup,ravimeda/core-setup,joperezr/core-setup,MichaelSimons/core-setup,MichaelSimons/core-setup,ericstj/core-setup,joperezr/core-setup,crummel/dotnet_core-setup,gkhanna79/core-setup,zamont/core-setup,rakeshsinghranchi/core-setup,gkhanna79/core-setup,weshaggard/core-setup,joperezr/core-setup,steveharter/core-setup,ramarag/core-setup,steveharter/core-setup,rakeshsinghranchi/core-setup,ramarag/core-setup,zamont/core-setup,steveharter/core-setup,chcosta/core-setup,joperezr/core-setup,rakeshsinghranchi/core-setup,ravimeda/core-setup,crummel/dotnet_core-setup,wtgodbe/core-setup,ericstj/core-setup,gkhanna79/core-setup,gkhanna79/core-setup,ravimeda/core-setup,ramarag/core-setup,crummel/dotnet_core-setup,vivmishra/core-setup,ravimeda/core-setup,janvorli/core-setup,rakeshsinghranchi/core-setup,MichaelSimons/core-setup,joperezr/core-setup,ericstj/core-setup,chcosta/core-setup,rakeshsinghranchi/core-setup,gkhanna79/core-setup,wtgodbe/core-setup,vivmishra/core-setup,steveharter/core-setup,zamont/core-setup,vivmishra/core-setup,chcosta/core-setup,chcosta/core-setup,steveharter/core-setup,rakeshsinghranchi/core-setup,janvorli/core-setup